|98-120 million (ethnic) · c. 1.9 million (linguistic)|
|Regions with significant populations|
|United Kingdom||122,518 (linguistic)|
|United States||27,475 (linguistic)|
|New Zealand||670 (linguistic)|
|Irish · Scottish Gaelic · Manx
(Non-Gaelic: English · Spanish)
|Christianity · Irreligion (historic: Paganism)|
|Related ethnic groups|
|Norse-Gaels · Old English (Ireland)|
The Gaels (English pronunciation: /ɡeːlˠ/; Irish: Na Gaeil; Scottish Gaelic: Na Gàidheil), also known as Goidels, are an ethnolinguistic group indigenous to northwestern Europe. They are associated with the Gaelic languages; a branch of the Celtic languages comprising Irish (Munster Irish, Connacht Irish, Ulster Irish), Manx and Scottish Gaelic. Other ethnonyms prominently associated with the Gaels historically have included Irish and Scots, but the scope of those nationalities is today more complex.
Gaelic language and culture originated in Ireland, extending to Dál Riata in southwest Scotland. In the Middle Ages, it became dominant throughout Scotland and the Isle of Man also. However, in most areas, the Gaels were gradually anglicized and the Gaelic languages supplanted by English. The modern descendants of the Gaels have spread throughout much of Great Britain and as far as the Americas and Oceania.
- 1 Ethnonyms
- 2 Population
- 3 History
- 4 Culture
- 5 Notes
- 6 References
- 7 External links
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Throughout the centuries, Gaels and Gaelic-speakers have been known by a number of names. The most consistent of these have been Gael, Irish and Scot, which continue to be used today, although the latter two have developed more ambiguous meanings (due to the early modern concept of the nation state and later romantic ideas, which encompasses non-Gaels). Other terms, such as Milesian, are not as frequently used. Informally, archetypal forenames such as Tadhg or Domhnall are sometimes used for Gaels.
The word Gaelic is first recorded in print in the English language in the 1770s, replacing the earlier word Gathelik which is attested as far back as 1596. Gael, defined as a "member of the Gaelic race", is first attested in print in 1810. The name ultimately derives from the Old Irish word Goídel, spelled officially today as Gael (Irish and Manx) and Gàidheal (Scottish Gaelic). In early modern Irish, the words Gaelic and Gael were spelled respectively Gaoidhealg and Gaoidheal. The more antiquarian term Goidels came to be used by some due to Edward Lhuyd's work on the relationship between Celtic languages (with the Gaelic languages been "Q-Celtic"). This term was further popularised in academia by John Rhys; the first Professor of Celtic at Oxford University; due to his work Celtic Britain (1882).
According to the scholar John T. Koch in his Celtic Culture: A Historical Encyclopedia, the word in the form of Guoidel was borrowed from a Primitive Welsh form that became an Old Welsh term, roughly meaning "forest people", "wild men" or later "warriors". It is recorded as a personal name in the Book of Llandaff. This term shared a root with the Old Irish fíad "deer", and was partially cognate with Féni, from the Proto-Indo-European *weidh-n-jo-. This latter word is the origin of Fianna and Fenian.
A common name, passed down to the modern day, is Irish; this existed in the English language during the 13th century in the form of Irisce, which derived from the stem of Old English Iras "inhabitant of Ireland", from Old Norse irar. The ultimate origin of this word is thought to be from the Old Irish Ériu, which is from Old Celtic *Iveriu, likely associated with the Proto-Indo-European term *pi-wer- meaning "fertile". Ériu is mentioned as a goddess in the Lebor Gabála Érenn as a daughter of Ernmas of the Tuatha Dé Danann. Along with her sisters Banba and Fódla, she is said to have made a deal with the Milesians to name the island after her.
The ancient Greeks; in particular Ptolemy in his 2nd century Geographia, possibly based on earlier sources; located a group known as the Iverni (Greek: Ιουερνοι) in the south-west of Ireland. This group has been associated with the Érainn of Irish tradition by T. F. O'Rahilly and others. The Érainn; claiming descent from a Milesian eponymous ancestor named Ailill Érann; were the hegemonic power in Ireland prior to the rise of the descendents of Conn of the Hundred Battles and Mug Nuadat. The Érainn included peoples such as the Corcu Loígde and Dál Riata. Ancient Roman writers, such as Caesar, Pliny and Tacitus, derived from "Ivernia" the name Hibernia. Thus the name Hibernian also comes from this root (although the Romans tended to call the Gaels "Scoti").
The Romans began to use the term Scoti to describe the Gaels in the Latin language from the 4th century onwards. In the context of the times, the Gaels were raiding the west-coast of Britain, raiding for hostages and took part in the Great Conspiracy; it is thus conjectured that the term means "raider, pirate". Although the Dál Riata settled in Argyll in the 6th century, the term "Scots" did not just apply to them, but to Gaels in general. Examples can be taken from Johannes Scotus Eriugena and other figures from Hiberno-Latin culture and the Schottenkloster founded by Irish Gaels in Germanic lands. It is also worth noting that eponymous characters were created in medieval Irish pseudo-histories: Scota, described as an Egyptian princess, and her husband Goídel Glas.
The Gaels of northern Britain referred to themselves as Albannaich in their own tongue and their realm as the Kingdom of Alba (founded as a successor state to Pictland and Dál Riata). Germanic groups tended to refer to the Gael as "Scottas" and so when Anglo-Saxon influence grew at court with Duncan II, the Latin Rex Scottorum began to be used and the realm was known as Scotland; this process and cultural shift was put into full effect under David I, who let the Normans come to power and furthered the Lowland-Highland divide. Lowland Germanics in Scotland spoke a language called Inglis, which they started to call Scottis (Scots) in the 16th century, while they in turn began to refer to Scottish Gaelic as "Erse".
In traditional Gaelic society, a patrilineal kinship group is referred to as a clann; this signifies a tribal grouping descended from a common ancestor, much larger than a personal family, which may also consist of various kindreds and septs. Using the Munster-based Eóganachta as an example, members of this clann claim patrilineal descent from Éogan Mór. It is further divided into major kindreds, such as the Eóganacht Chaisil, Glendamnach, Áine, Locha Léin and Raithlind. These kindreds themselves contain septs that have passed down as Irish Gaelic surnames, for example the Eóganacht Chaisil includes O'Callaghan, MacCarthy, O'Sullivan and others.
The Irish Gaels can be grouped into the following major historical clans; Connachta (including Uí Néill, Clan Colla, Uí Maine, etc.), Dál gCais, Eóganachta, Érainn (including Dál Riata, Dál Fiatach, etc.), Laigin and Ulaid (including Dál nAraidi). In the Highlands, the various Gaelic-originated clans tended to claim descent from one of the Irish groups, particularly those from Ulster. The Dál Riata (i.e. - MacGregor, MacDuff, MacLaren, etc.) claimed descent from Síl Conairi, for instance. Some arrivals in the High Middle Ages (i.e. - MacNeill, Buchanan, Munro, etc.) claimed to be of the Uí Néill. As part of their self-justification; taking over power from the Norse-Gael MacLeod in the Hebrides; the MacDonalds claimed to be from Clan Colla.
For the Irish Gaels, the old clan system did not survive the incorporation of the Gaelic realms into the Kingdom of Ireland and the subsequent Flight of the Earls. As a result of the Gaelic revival, there has been renewed interest in Irish genealogy; the Irish Government recognised Gaelic Chiefs of the Name since the 1940s. The Finte na hÉireann (Clans of Ireland) was founded in 1989 to gather together clan associations; individual clan associations operate throughout the world and produce journals for their septs. The Highland clans held out until the 18th century Jacobite risings. During the Victorian-era, symbolic tartans, crests and badges were retroactively applied to clans. Clan associations built up over time and Na Fineachan Gàidhealach (The Highland Clans) was founded in 2013.
At the turn of the 21st century, the principles of human genetics and genetic genealogy were applied to the study of populations of Gaelic origin. It was found that the overwhelming majority belonged to haplogroup R1b in their Y-chromosome DNA (as with much of Western Europe), with the marker R-P312-4 (R-L21) being specifically associated with the Gaelic Irish. The two other peoples who recorded higher than 85% for R1b in a 2009 study published in the scientific journal, PLOS Biology, were the Welsh and the Basques.
The development of in-depth studies of DNA sequences known as STRs and SNPs, have allowed geneticists to associate subclades with specific Gaelic kindred groupings (and their surnames), vindicating significant elements of Gaelic genealogy, as found in works such as the Leabhar na nGenealach. Examples can be taken from the Uí Néill (i.e. - O'Neill, O'Donnell, Gallagher, etc.), who are associated with R-M222 and the Dál gCais (i.e. - O'Brien, McMahon, Kennedy, etc.) who are associated with R-L226. With regards to Gaelic genetic genealogy studies, these developments in subclades have aided people in finding their original clan group in the case of a non-paternity event, with Family Tree DNA having the largest such database at present.
In countries where Gaels live, census records documenting population statistics have taken place. The following includes the number of speakers of a Gaelic language (either Gaeilge, also known as Irish, Gàidhlig, known as Scottish Gaelic, or Gaelg, known as Manx). The question of ethnic identity is slightly more complex, but included below are those who identify with Irish or Scottish ethnicity. It should be taken into account that not all will have Gaelic descent, especially in the case of Scotland, due to the nature of the Lowlands. It also depends on the self-reported response of the individual and so is a rough guide rather than an exact science.
The two comparatively "major" Gaelic nations in the modern era are Ireland (which in the 2002 census had 185,838 people who spoke Irish "daily" and 1,570,894 who were "able" to speak it) and Scotland (58,552 "Gaelic speakers" and 92,400 with "some Gaelic language ability" in the 2001 census). Communities where the languages are still spoken natively are restricted largely to the west coast of each country and especially the Hebrides in Scotland. However, a large proportion of the Gaelic speaking population now lives in the cities of Glasgow and Edinburgh in Scotland, and Donegal, Galway, Cork and Dublin in Ireland. There are about 2,000 Scottish Gaelic speakers in Canada (Canadian Gaelic dialect), although many are elderly and concentrated in Nova Scotia and Cape Breton Island. According to the 2000 US Census, there are over 25,000 Irish-speakers in the United States with the majority found in urban areas with large Irish-American communities such as Boston, New York City and Chicago.
|State||Gaeilge||Ethnic Irish||Gàidhlig||Ethnic Scots||Gaelg||Ethnic Manx|
|Ireland||1,770,000 (2011)||3,969,319 (2011)||not recorded||not recorded||not recorded||not recorded|
|United Kingdom and dependencies||64,916 (2011)||1,101,994 (2011)||57,602 (2011)||4,446,000 (2011)||1,689 (2000)||38,108 (2011)|
|United States||25,870 (2000)||33,348,049 (2013)||1,605 (2000)||5,310,285 (2013)||not recorded||6,955|
|Canada||7,500 (2011)||4,354,155 (2006)||1,500 (2011)||4,719,850 (2006)||not recorded||4,725|
|Australia||1,895 (2011)||2,087,800 (2011)||822 (2001)||1,876,560 (2011)||not recorded||46,000|
|New Zealand||not recorded||14,000 (2013)||670 (2006)||12,792 (2006)||not recorded||not recorded|
Although the concept of European pre-Columbian contact with the Americas remains a controversial field, there are a number of questions raised that are relevant to the Gaels. Perhaps the most prominent is the story of Brendan the Voyager and his 6th century North Atlantic immram. Scholars have speculated as to the location of St Brendan's Isle, with some associating it with North America. In the 1970s, Barry Fell first claimed that some American rock petroglyphs are Gaelic ogham, although many of his claims have been dismissed, David H. Kelley still contends that in some instances the inscriptions are indeed ogham.
On a more firmly established historical footing are the examples of the Gaelic diaspora in Europe. As the Roman Empire began to collapse, the Gaels; along with the Anglo-Saxons; were one of the peoples able to take advantage in Great Britain from the 4th century onwards. The proto-Eóganachta Uí Liatháin and the Déisi Muman of Dyfed both established colonies in today's Wales. Further to the north, the Érainn's Dál Riata colonised Argyll (eventually founding Alba) and there was a significant Gaelic influence in Northumbria and the MacAngus clan arose to the Pictish kingship by the 8th century. Gaelic Christian missionaries were also active across the Frankish Empire. With the coming of the Viking Age and their slave markets, Gaels were also dispersed in this way across the realms under Viking-control; as a legacy, in genetic studies, Icelanders exhibit high levels of Gaelic-derived mDNA.
Since the fall of Gaelic polities, the Gaels have made their way across parts of the world, mainly under the auspices of the British Empire, but to a lesser extent under the Spanish Empire. Core destinations for "exiles" have been North America (what is today the United States and Canada) and Oceania (Australia and New Zealand). As well as this there has been a mass "internal migration" within the British Isles from the 19th century, with Gaelic Irish peasantry and Highlanders migrating to the English-speaking industrial cities of London, Dublin, Glasgow, Liverpool, Manchester, Birmingham, Leeds, Edinburgh and others. Many underwent a linguistic "Anglicisation" and some eventually merged with Anglo populations.
In their own national epic contained within medieval works such as the Lebor Gabála Érenn, the Gaels trace the origin of their people to an eponymous ancestor named Goídel Glas. He is described as a Scythian prince (the grandson of Fénius Farsaid), who is credited within creating the Gaelic languages. Goídel's mother is called Scota, described as an Egyptian princess (some modern writers associate her with Meritaten). The Gaels are depicted as wandering from place to place for hundreds of years; they spend time in Egypt, Crete, Scythia, the Caspian Sea and Getulia, before arriving in Iberia. It is here that their king, Breogán, is said to have founded Galicia.
The Gaels are then said to have sailed to Ireland via Galicia in the form of the Milesians, sons of Míl Espáine. The Gaels fight a battle of sorcery with the Tuatha Dé Danann, the gods, who inhabited Ireland at the time. Ériu, a goddess of the land, promises the Gaels that Ireland shall be theirs so long as they give tribute to her. They agree, and their bard Amergin recites an incantation known as the Song of Amergin. The two groups agree to divide Ireland between them: the Gaels take the world above, while the Tuath Dé take the world below (i.e. the Otherworld).
Advances in DNA studies have revealed some clues about the origin of the Gaels (who are associated with paternal R-L21). Haplogroup R originated 26,800 years ago in Central Asia during the Last Ice Age. The R1b branch had broken off by the Paleolithic and its derivative R-M269 was found at the Pontic-Caspian steppe by the Chalcolithic (the Kurgan hypothesis makes these speakers of Proto-Indo-European). First entering Europe proper 7,000 years ago, the Indo-Europeans developed bronze weapons and domesticated the horse, giving them the upper-hand in their conquest of the Old Europe and the proliferation of their lineages. After the R-L51 subclade founded the Unetice culture, a derivative R-L21 moved West arriving in Britain c. 2100 BCE and Ireland c. 2000 BCE, becoming the Gaelic people.
According to the Annals of the Four Masters, the early branches of the Milesian Gaels were the Heremonians, the Heberians and the Irians, descended from the three brothers Érimón, Éber Finn and Ír respectively. Another group were the Ithians, descended from Íth (an uncle of Milesius) who were located in South Leinster (associated with the Brigantes) but they later became extinct. The Four Masters date the start of Milesian rule from 1700 BCE. Initially, the Hermonians dominated the High Kingship of Ireland from their stronghold of Mide, the Heberians were given Munster and the Irians were given Ulster. At this early point of the Milesian-era, the non-Gaelic Fir Domnann held Leinster and the Fir Ol nEchmacht held what was later known as Connacht (possibly remnants of the Fir Bolg).
During the Iron Age there was heightened activity at a number of important royal ceremonial sites, including Tara, Dún Ailinne, Rathcroghan and Emain Macha. Each was associated with a Gaelic tribe. The most important was Tara, where the High King (also known as the King of Tara) was inaugurated on the Lia Fáil (Stone of Destiny), which stands to this day. According to the Annals, this era also saw, during the 7th century BCE, a branch of the Heremonians known as the Laigin, descending from Úgaine Mór's son Lóegaire Lorc, displacing the Fir Bolg remnants in Leinster. This was also a critical period for the Ulaid (earlier known as the Irians) as their kinsman Rudraige Mór took over the High Kingship in the 3rd century BCE; his offspring would be the subject of the Ulster Cycle of heroic tradition, including the epic Táin Bó Cúailnge. This includes the struggle between Conchobar mac Nessa and Fergus mac Róich.
After regaining power, the Heremonians, in the form of Fíachu Finnolach were overthrown in a 1st-century AD provincial coup. His son, Túathal Techtmar was exiled to Roman Britain before returning to claim Tara. Based on the accounts of Tacitus, some modern historians associate him with an “Irish prince” said to have been entertained by Agricola, Governor of Britain and speculate at Roman sponsorship. His grandson, Conn Cétchathach, is the ancestor of the Connachta who would dominate the Irish Middle Ages. They gained control of what would now be named Connacht. Their close relatives the Érainn (both groups descend from Óengus Tuirmech Temrach) and the Ulaid would later lose out to them in Ulster, as the descendants of the Three Collas in Airgíalla and Niall Noígíallach in Ailech extended their hegemony.
The Gaels emerged into the clear historical record during the classical-era, with ogham inscriptions and quite detailed references in Greco-Roman ethnography (most notably by Ptolemy). The religion of Christianity reached Ireland during the 5th century, most famously through a Romano-British slave Patrick, but also through Gaels such as Declán, Finnian and the Twelve Apostles of Ireland. The abbot and the monk eventually took over certain cultural roles of the aos dána (not least the roles of druí and seanchaí) as the oral culture of the Gaels was transmitted to script by the arrival of literacy. Thus Christianity in Ireland during this early time retained elements of Gaelic culture.
By the 6th century, the division of Ireland into two spheres of influence; Leath Cuinn and Leath Moga; was largely a reality. In the south, the influence of the Eóganachta based at Cashel grew further, to the detriment of Érainn clans such as the Corcu Loígde and Clann Conla. Through their vassals the Déisi (descended from Fiacha Suidhe and later known as the Dál gCais), Munster was extended north of the River Shannon, laying the foundations for Thomond. Aside from their gains in Ulster (excluding the Érainn's Ulidia), the Uí Néill's southern branch had also pushed down into Mide and Brega. This era was also marked by a Gaelic presence in Great Britain; in what is today Wales, the Déisi founded Dyfed and the Uí Liatháin founded Brycheiniog. To the north, the Dál Riata are held to have established a territory in Argyll and the Hebrides.[nb 2] The Romans called these Gaels "Scoti".
Some; particularly champions of Christianity; hold the 6th to the 9th centuries to be a Golden Age for the Gaels. This is due to the influence which the Gaels had across Western Europe as part of their Christian missionary activities. Similar to the Desert Fathers, Gaelic monastics were known for their asceticism. Some of the most celebrated figures of this time were Columba, Aidan, Columbanus and others. Learned in Greek and Latin during an age of cultural collapse, the Gaelic scholars were able to gain a presence at the court of the Carolingian Frankish Empire; perhaps the best known example is Johannes Scotus Eriugena. Aside from their activities abroad, insular art flourished domestically, with artifacts such as the Book of Kells and Tara Brooch surviving. Clonmacnoise, Glendalough, Clonard, Durrow and Inis Cathaigh are some of the more prominent Ireland-based monasteries founded during this time.
The late 8th century heralded external involvement in Gaelic affairs as the Norsemen from Scandinavia; known as the Vikings; began to raid and pillage settlements looking for booty. The earliest recorded cases of this were Rathlin and Iona in 795; these hit and run attacks would continue for some time until they began to settle in the 840s at Dublin (setting up a large slave market), Limerick, Waterford and elsewhere. The Norsemen also took the Hebrides and the Isle of Man from the Dál Riata clans and established the Kingdom of the Isles. Around the same time the MacAlpin clan were founding the Kingdom of Alba, after the Gaels had gradually submerged Pictland; Kenneth MacAlpin is most associated with this process.
After a spell where the Norsemen were driven from Dublin by Leinsterman Cerball mac Muirecáin, they returned in the reign of Niall Glúndub, initiating a second Viking period. The Dublin Norse; some of them, such as Uí Ímair king Ragnall ua Ímair now partly Gaelicised as the Norse-Gaels; were a serious regional power, with territories across Northumbria and York. At the same time, the Uí Néill branches were involved in an internal power struggle to see if the northern or southern branch would be the hegemonic Gaelic force. Donnchad Donn raided Munster and took Cellachán Caisil of the Eóganachta hostage. The destabilisation inadvertently led to the rise of the Dál gCais and Brian Bóruma. Through military might, Brian went about constructing a Gaelic Imperium under his High Kingship, even gaining the submission of Máel Sechnaill mac Domnaill. They were involved in a series of battles against the Vikings; Tara, Glenmama and Clontarf; the latter of which saw Brian's death in 1014, glorified in the Cogad Gáedel re Gallaib.
The Irish Church became closer to Continental models with the Synod of Ráth Breasail and the arrival of the Cistercians; as well as this there was more economic trade and interlocking with Normanised Britain and France. Between themselves, the Ó Briain and the Ó Conchobhair attempted to erect a national monarchy. The remainder of the Middle Ages would be defined by the conflict between Gael and Norman. The Normans arrived in Leinster initially due to Diarmait Mac Murchada's alliance with the Normans of Wales; following this, the King of England, with the backing of the Papacy, established the Lordship of Ireland in 1171 to stifle this rival force. The origins of a literary anti-Gaelic sentiment was born in this time, forwarded by the likes of Gerald of Wales, as part of a propaganda campaign (with a Gregorian "reform" gloss) to justify taking Gaelic lands. Many Irish kingdoms remained outside of Norman control and Gallowglass warriors were brought in from the Highlands to fight for various kings.
During the 15th century, with the advent of the early modern age, the Gaels were affected by the policies of the Tudors and the Stewarts who sought to Anglicise the population and bring both Ireland and the Highlands under a stronger monarchial control, as part of what would become the British Empire. The Kingdom of Ireland, which had its power in the Pale of Dublin was implemented and the high aristocracy was encouraged to apply for a surrender and regrant. This brought to end the independence of the last few Gaelic Irish kingdoms. The policies of the Lowland Scots Parliament were similar with the Statutes of Iona taking place in 1609 before the Union of the Crowns.
Since that time Gaelic language rose and, in the past three centuries, greatly diminished, in most of Ireland and Scotland. The 19th century was the turning point as The Great Hunger in Ireland and across the Irish Sea, the Highland Clearances, had the effect of causing mass emigration (leading to Anglicisation, but also a large Irish diaspora in particular). The language was rolled back to the Gaelic strongholds of the north west of Scotland, the west of Ireland and Cape Breton Island in Nova Scotia.
The Gaelic revival also occurred in the 19th century, with organisations such as Conradh na Gaeilge and An Comunn Gàidhealach attempting to restore the prestige of Gaelic culture and to restore the hegemony of their language. Many of the participants in the Irish Revolution of 1912-1923 were inspired by these ideals and so when a sovereign state was formed (the Irish Free State), the ideal of Gaelic culture was now more popular. Despite policies such as mandatory Irish language education, the living first-language communities have continued to become smaller however.
The Isle of Man (Manx: Ellan Vannin, 'Mannin's Isle', from the pre-Christian deity known as Manannán mac Lír) also came under massive Gaelic influence in its history. The last native speaker of Manx died in the 1970s, though use of the Manx language never fully ceased. There is now a resurgent language movement and Manx is once again taught in all schools as a second language and in some as a first language.
The Gaelic languages are part of the Celtic languages and fall under the wider Indo-European language family. There are two main historical theories concerning the origin and development of the Gaelic languages from a Proto-Celtic root; the North Atlantic-based Insular Celtic hypothesis posits that Goidelic and Brythonic languages have a more recent common ancestor than Continental Celtic languages, while the Q-Celtic and P-Celtic hypothesis posits that Goidelic is more closely related to the Celtiberian language, while Brythonic is closer to the Gaulish language.
Estimates of the emergence of proto-Gaelic in Ireland vary widely from the introduction of agriculture circa 7000–6000 BC to around the first few centuries BC. Little can be said with certainty, as the language now known as Old Irish—ancestral to modern Irish, Scots Gaelic and Manx—first began to be properly recorded with the Christianisation of Ireland in the 4th century, after the introduction of the Roman script. Primitive Irish does appear in a specialised written form, using a unique script known as Ogham. The oldest examples of Ogham have survived in the form of memorial inscriptions or short epitaphs on pillar-like stone monuments (see Mac Cairthinn mac Coelboth.) Ogham stones are found throughout Ireland and neighbouring parts of Britain. This form of written Primitive Irish is thought to have been in use as early as 1000 BC. The script frequently encodes a name or description of the owner and surrounding region, and it is possible that the inscribed stones may have represented territorial claims.
The Gaelic languages have been undergoing an existential crisis since at least the 19th century, when they went from majority languages of Ireland and the Scottish Highlands, to an endangered language today. The spread of the English language has had the most significant impact historically on the number of speakers and a majority of people of Gaelic ancestry do not speak their forefather's language today. As far back as the Statutes of Kilkenny in 1366 there had been efforts to dissuade use of Gaelic for political reasons. The Statutes of Iona in 1609 and the early workings of the SSPCK in the Highlands are also notable examples. As the old Gaelic aristocracy were displaced or assimilated, the language lost its patronage and became primarily a peasant language, rather than one of education and the arts.
During the 19th century, a number of Gaeilgeoir (Irish language enthusiast) organisations were founded to promote a broad cultural and linguistic revival. Conradh na Gaeilge was set up in 1893 and had its origins in Charles Owen O'Conor's Gaelic Union, itself a derivative of the Society for the Preservation of the Irish Language. Similar Highland Gaelic groups existed, such as An Comunn Gàidhealach. At this time, Irish Gaelic was widely spoken along the Western seaboard (and a few other enclaves) and the Gaelic League began defining it as the "Gaeltacht", idealised as the core of true Irish-Ireland, rather than the Anglo-dominated Dublin. Although the Gaelic League itself aimed to be apolitical, this ideal was attractive to militant republicans such as the Irish Republican Brotherhood, who formulated and led the Irish Revolution at the turn of the 20th century; a key leader, Pádraig Pearse, imagined an Ireland "Not merely Free but Gaelic as well - Not merely Gaelic but Free as well." Scottish Gaelic did not undergo as extensive of a politicalisation at this juncture, as nationalists there tended to focus on the Lowland mythos of William Wallace rather than the Gàidhealtachd.
During the 1950s, the independent Irish state developed An Caighdeán Oifigiúil as a national standard for the Irish language (using elements from local dialects but leaning towards Connacht Irish), with a simplified spelling. Until 1973, school children had to pass Modern Irish to achieve a Leaving Cert and studying the subject remains obligatory. There are also Gaelscoileanna where children are taught exclusively through the medium of Irish. In the Gaeltacht itself, the language has continued to be in crisis under the pressure of globalism, but there are institutions such as Údarás na Gaeltachta and a Minister for the Gaeltacht, as well as media outlets such as TG4 and RTÉ Raidió na Gaeltachta to support it. The last native Manx Gaelic speaker died in 1974, although there are ongoing attempts at revival. While the Gàidhealtachd has retracted in the Highlands, Scottish Gaelic has enjoyed renewed support with the Gaelic Language (Scotland) Act 2005, establishing the Bòrd na Gàidhlig under the devolved Scottish Government. This has seen the growth of Gaelic medium education. There are also media outlets such as BBC Alba and BBC Radio nan Gàidheal.
The traditional, or "pagan", worldview lived by the pre-Christian Gaels of Ireland is typically described as animistic, polytheistic, ancestor venerating and focused on the hero cult of archetypal Gaelic warriors such as Cú Chulainn and Fionn mac Cumhaill. The four seasonal festivals celebrated in the Gaelic calendar; still observed to this day; are Imbolc, Beltane, Lughnasadh and Samhain. While the general worldview of the Gaelic tradition has been recovered, a major issue to wrestle with for academic scholars is that Gaelic culture was oral prior to the coming of Christianity and monks were the first to record their beliefs in a palatable manner as "mythology". Unlike other religions, there is no overall "holy book" systematically setting out exact rules to follow, but various works, such as the Lebor Gabála Érenn, Dindsenchas, Táin Bó Cúailnge and Acallam na Senórach, carry the Gaelic tradition's essence.
The main gods held in high regard, were the Tuatha Dé Danann; the beings said to have ruled Ireland before the coming of the Milesians; known in later times as the aes sídhe. Among the gods were male and female deities such as The Dagda, Lugh, Nuada, The Morrígan, Aengus, Brigid and Áine, as well as many others. They were associated with specific social functions, seasonal events and personal characteristics. Some physical locations of importance in these stories include the Brú na Bóinne, Hill of Tara and Hill of Uisneach. Although they were held to intervene in worldly affairs sometimes, particularly battles and issues of sovereignty, the gods were held to reside in the Otherworld, also known as Mag Mell (Plain of Joy) or Tír na nÓg (Land of the Young). This realm was variously held to be located on a set of islands or underground. The Gaels believed that certain heroes could visit this spiritual realm, as recounted in the various echtra (adventure) and immram (voyage) tales.
The Gaels underwent Christianisation during the 5th century and that religion, de facto, remains the predominant one to this day, although irreligion is fast rising. At first the Christian Church had difficulties infiltrating Gaelic life; Ireland had never been part of the Roman Empire and was a de-centralised tribal society, making patron-based mass conversion problematic. It gradually penetrated through remnants of Roman Britain and is especially associated with the activities of Patrick; a Briton who had been a slave in Ireland. He tried to explain its doctrines by using elements of native folk tradition, so Gaelic culture itself wasn't completely cast aside and to some extent local Christianity was Gaelicised. The last High King inaugurated in the pagan style was Diarmait mac Cerbaill. The 6th-9th centuries are generally held to be the height of Gaelic Christianity with numerous saints, scholars and works of devotional art.
This balance began to unravel during the 12th century with the polemics of Bernard of Clairvaux, who attacked various Gaelic customs (including polygamy and hereditary clergy) as "pagan". The Catholic Church of the time, fresh from its split with the Orthodox Church, was becoming more centralised and uniform throughout Europe with the Gregorian Reform and military reliance on Germanic peoples at the fringes of Latin Christendom, particularly the warlike Normans. As part of this, the Catholic Church actively participated in the Norman conquest of Gaelic Ireland, with the issuing of Laudabiliter (claiming to gift the King of England the title "Lord of Ireland") and in Scotland strongly encouraged the program of king David who Normanised that country. Even within orders such as the Franciscans, ethnic tensions between Norman and Gael continued throughout the later Middle Ages, as well as competition for ecclesiastic posts.
During the 16th century, with the emergence of Protestantism and Tridentine Catholicism, a distinct Christian sectarianism made its way into Gaelic life, with societal effects carrying on down to this day. The Tudor state used the Anglican Church to bolster their power and enticed native elites into the project, without making much initial effort to convert the Irish Gaelic masses, meanwhile, the mass of Gaeldom (as well as the "Old English") became staunchly Catholic. Due to the geopolitical rivalry between Protestant Britain and Catholic France or Spain, the Catholic religion and its mostly Gaelic followers in Ireland were persecuted for a long time. In the Scottish Highlands too, the Gaels remained mostly Catholic, but many of them would later convert to Presbyterianism in the 19th century.
- The census returns for the United Kingdom are broken down on a constituency country basis. White Irish was an option in the ethnicity section of the 2011 Census of the United Kingdom; this did not distinguish between those of Gaelic Irish descent and those of Anglo-Irish descent. The results for this were; 531,087 in England and Wales, 517,907 in Northern Ireland and 53,000 in Scotland. According to the census, 83% (or 4,399,000) of the population in Scotland identified as "Scottish" and this did not distinguish between Gaelic Highlander and Anglo Lowlander ethnicities. In the rest of the United Kingdom, the Scots were included under White British.
- A minority of historical revisionists have come to challenge the traditional account of the origins of Gaelic Scotland as being derived directly from Gaelic Ireland via population movement as laid out in works such as the Senchus fer n-Alban and the Annals of Tigernach. The pioneering figure in this direction is Dr. Ewan Campbell of the University of Glasgow with his 2001 paper Were the Scots Irish?; an archaeologist, he argues that there is no evidence of mass population movement across the Irish Sea for this time period at Dunadd.
- "Census 2011: 1.77m say they are able to speak Irish". The Journal. 7 February 2014.
- "Census 2011: Key Statistics for Northern Ireland" (PDF). Northern Ireland Statistics and Research Agency. 7 February 2014.
- Osbourn 2006, p. 204.
- "National Household Survey (NHS) 2011". Statistics Canada. Retrieved 7 February 2015.
- "The Irish language in Australia: sociocultural identity in diasporic minority language use". Jill Vaughan. 7 February 2015.
- O'Leary 2004, p. 376.
- "Gaelic". Online Etymology Dictionary. 6 November 2012.
- "Gael". Online Etymology Dictionary. 6 November 2012.
- Koch 2004, p. 775.
- "Goidel". Oxford English Dictionary. December 1989. Retrieved 14 April 2010..
- "Féni". Oxford Reference. 13 November 2012.
- "Irish". Online Etymology Dictionary. 6 November 2012.
- "On the Origin of the Names Érainn and Ériu". T. F. O'Rahilly. 6 November 2012.
- Koch 2004, p. 709.
- Koch 2004, p. 1571.
- "Scot". Online Etymology Dictionary. 13 February 2015.
- "Erse". Online Etymology Dictionary. 13 February 2015.
- "What is a Clan?" (PDF). Dr. Bruce Durie. 28 July 2015.
- Byrne 1973, p. 291.
- O'Duffy 2005, p. 263.
- "Surnames in the Eoganacht sept project". Eoganacht Septs. 26 January 2015.
- "Eo´ganacht septs". Family Tree DNA. 26 January 2015.
- Thornton 2003, p. 201.
- "Origins Part 2: Clan Colla and the Origins of Clan Donald". Clan Donald Heritage. 26 January 2015.
- "DNA of the Three Collas". Peter Biggins. 26 January 2015.
- Ellis 2002, p. 351.
- Ellis 2002, p. 95.
- "About the Clans of Ireland". Finte na hÉireann. 29 January 2015.
- "The Highland origin of Clans". Association of Highland Clans & Societies. 29 January 2015.
- "A Y-Chromosome Signature of Hegemony in Gaelic Ireland". American Journal of Human Genetics. 26 January 2015.
- "Genetic investigation of the patrilineal kinship structure of early Medieval Ireland". American Journal of Physical Anthropology. 26 January 2015.
- "Haplogroup R1b (Y-DNA)". Eupedia. 26 January 2015.
- "Origins of the Irish, Scottish, Welsh and English R1b-M222 population". Anatole A. Klyosov. 26 January 2015.
- "A Predominantly Neolithic Origin for European Paternal Lineages". PLOS Biology. 26 January 2015.
- "Insights Into the O’Neills of Ireland from DNA Testing". Edwin. B. O'Neill. 26 January 2015.
- "A Set of Distinctive Marker Values Defines a Y-STR Signature for Gaelic Dalcassian Families". Denis M. Wright. 26 January 2015.
- "What’s in a name? Y chromosomes, surnames and the genetic genealogy revolution" (PDF). Cell Press. 6 February 2015.
- Central Statistics Office Ireland – Irish ability, persons aged 3 years and over.
- General Register Office, Scotland's Census 2001, Gaelic Report
- Oifis Iomairtean na Gaidhlig/Office of Gaelic Affairs
- "2011 Census for England and Wales: Religion and Ethnicity Data Overview" (PDF). BRAP. 7 February 2014.
- "Manx". World Directory of Minorities and Indigenous Peoples. 7 February 2014.
- "Selected Social Characteristics in the United States (DP02): 2013 American Community Survey 1-Year Estimates". U.S. Census Bureau. Retrieved December 11, 2014.
- "Visual census, Ethnic origin and visible minorities, Canada". Statistics Canada. Retrieved 7 February 2015.
- "The People of Australia: Statistics from the 2013 Census" (PDF). Department of Immigration and Border Protection. 7 February 2015.
- "Census reveals scale of NZ Irish population". Irish Echo. 7 February 2015.
- "Spanish documents suggest Irish arrived in America before Columbus". Irish Central. 10 February 2015.
- "Did St. Brendan Reach North America 500 Years Before the Vikings?". National Geographic Society. 10 February 2015.
- "Proto-Tifinagh and Proto-Ogham in the Americas". The Review of Archaeology. 10 February 2015.
- "Seventh-Century Ireland as a Study Abroad Destination" (PDF). Colin Ireland. 10 February 2015.
- ""They Accuse Us of Being Descended from Slaves": Settlement History, Cultural Syncretism and the Foundation of Medieval Icelandic Identity". Rutgers University. 10 February 2015.
- Ó Cróinín 2005, p. 166.
- Rankin 2002, p. 306.
- Byrne 1973, p. 73.
- "The Adoption of Christianity by the Irish and Anglo-Saxons: The Creation of Two Different Christian Societies". Thomas Martz. 8 February 2015.
- Byrne 1973, p. 180.
- Byrne 1973, p. 72.
- "Ancient Ireland: The Monastic Tradition". Daily Kos. 28 March 2015.
- MacManus 1921, p. 215.
- "John Scottus Eriugena". Stanford Encyclopedia of Philosophy. 28 March 2015.
- "Driving a Wedge within Gaeldom". History Ireland. 24 February 2015.
- "Irish as an endangered language". Marlyhurst University. 21 July 2015.
- "'Endangered' Gaelic on map of world's dead languages". The Scotsman. 21 July 2015.
- "Words Between Worlds: The Irish Language, the English Army, and the Violence of Translation in Brian Friel's Translations". Collin Meissner. 21 July 2015.
- "Let’s speak Gaeilge however we can and wherever we want". Irish Examiner. 21 July 2015.
- Tanner 2006, p. 65.
- "Manx: Bringing a language back from the dead". BBC. 21 July 2015.
- "Language as activism: the big Gaelic comeback". New Statesman. 21 July 2015.
- Welch 1992, p. 4.
- Welch 1992, p. 12.
- Welch 1992, p. 2.
- "Religiosity Plummets in Ireland and Declines Worldwide; Atheism On the Rise". Huffington Post. 21 July 2015.
- "Marriage in Medieval Ireland by Art Cosgrove". History Ireland. 21 July 2015.
- Bradshaw 1993, p. 26.
- "Two nations, one order: the Franciscans in medieval Ireland". History Ireland. 21 July 2015.
- Bartlett, Robert (1994). The Making of Europe: Conquest, Colonization and Cultural Change, 950-1350. Penguin. ISBN 0140154094.
- Bateman, Mary (2007). Duanaire Na Sracaire: Songbook of the Pillagers, Anthology of Scottish Gaelic Verse to 1600. Birlinn. ISBN 184158181X.
- Bradshaw, Brendan (1993). Representing Ireland: Literature and the Origins of Conflict, 1534-1660. Cambridge University Press. ISBN 0521416345.
- Bradshaw, Brendan (2015). ‘And so began the Irish Nation’: Nationality, National Consciousness and Nationalism in Pre-modern Ireland. Ashgate Publishing. ISBN 1472442563.
- Byrne, Francis J. (1973). Irish Kings and High Kings. Four Courts Press. ISBN 1851821961.
- Calloway, Colin G. (2010). White People, Indians, and Highlanders: Tribal People and Colonial Encounters in Scotland and America. Oxford University Press. ISBN 9780199737826.
- Canny, Nicholas (2001). Making Ireland British, 1580-1650. OUP Oxford. ISBN 9780199259052.
- Charles-Edwards, T. M. (2007). Early Christian Ireland. Cambridge University Press. ISBN 9780521037167.
- Clancy, Thomas Owen (2008). The Triumph Tree: Scotland's Earliest Poetry AD 550-1350. Canongate Classics. ISBN 0862417872.
- Connolly, S. J. (2009). Contested Island: Ireland 1460-1630. OUP Oxford. ISBN 0199563713.
- Connolly, S. J. (2010). Divided Kingdom: Ireland 1630-1800. OUP Oxford. ISBN 0199583870.
- Coogan, Tim Pat (2013). The Famine Plot: England's Role in Ireland's Greatest Tragedy. Palgrave Macmillan. ISBN 1137278838.
- Crowley, Tony (2008). Wars of Words: The Politics of Language in Ireland 1537-2004. OUP Oxford. ISBN 0199532761.
- Ellis, Peter Berresford (2002). Erin's Blood Royal: The Gaelic Noble Dynasties of Ireland. Palgrave Macmillan. ISBN 0312230494.
- Denvir, John (1892). The Irish in Britain from the Earliest Times to the Fall and Death of Parnell. Kegan Paul, Trench, Trübner.
- Gibbons, Luke (2004). Gaelic Gothic: Race, Colonization and Irish Culture. Alren House. ISBN 1903631394.
- Gibson, D. Blair (2012). From Chiefdom to State in Early Ireland. Cambridge University Press. ISBN 1107015634.
- Harbison, Peter (1999). The Golden Age of Irish Art: The Medieval Achievement 600-1200. Thames & Hudson. ISBN 0500019274.
- Kinsella, Thomas (1981). An Duanaire 1600-1900: Poems of the Dispossessed. Dolmen Press. ISBN 9780851053646.
- Koch, John T. (2004). Celtic Culture: A Historical Encyclopedia. ABC-CLIO. ISBN 9781851094400.
- Leerssen, Joep (1997). Mere Irish and Fior-Ghael: Studies in the Idea of Irish Nationality, Its Development and Literary Expression Prior to the Nineteenth Century. University of Notre Dame Press. ISBN 0268014272.
- Lenihan, Patrick (2007). Consolidating Conquest: Ireland 1603-1727. Routledge. ISBN 0582772176.
- Mac Giolla Chríost, Diarmait (2005). The Irish Language in Ireland: From Goídel to Globalisation. Routledge. ISBN 0415320461.
- Macleod, John (1997). Highlanders: A History of the Gaels. Sceptre. ISBN 0340639911.
- MacManus, Seamus (1921). The Story of the Irish Race: A Popular History of Ireland. The Irish Publishing Company. ISBN 0-517-06408-1.
- McLeod, Wilson (2004). Divided Gaels: Gaelic Cultural Identities in Scotland and Ireland C.1200-C.1650. OUP Oxford. ISBN 0199247226.
- Newton, Michael (2000). A Handbook of the Scottish Gaelic World. Four Courts Press. ISBN 185182541X.
- Newton, Michael (2009). Warriors of the Word: The World of the Scottish Highlanders. Birlinn. ISBN 1841588261.
- O'Callaghan, Sean (2001). To Hell or Barbados: The Ethnic Cleansing of Ireland. Brandon. ISBN 0863222870.
- O'Conor Don, Charles (1753). Dissertations On the Ancient History of Ireland. J. Christie.
- Ó Cróinín, Dáibhí (2005). A New History of Ireland, Volume I: Prehistoric and Early Ireland. Oxford University Press. ISBN 9780199226658.
- O'Duffy, Séan (2005). Medieval Ireland: An Encyclopedia. Routledge. ISBN 1135948240.
- Ó Flaithbheartaigh, Ruaidhrí (1685). Ogygia: A Chronological Account of Irish Events. B. Tooke.
- O'Halloran, Sylvester (1778). A General History of Ireland. Hamilton.
- Ó hÓgáin, Dáithí (2001). The Sacred Isle: Belief and Religion in Pre-Christian Ireland. Boydell Press. ISBN 9780851157474.
- O'Leary, Philip (2004). The Prose Literature of the Gaelic Revival, 1881-1921. Pennsylvania State University Press. ISBN 0271025964.
- Ó Muraíle, Nollaig (2004). The Great Book of Irish Genealogies. De Burca Books. ISBN 0946130361.
- Osbourn, Terry A. (2006). Teaching World Languages for Social Justice: A Sourcebook of Principles and Practices. Routledge. ISBN 1135609853.
- Patterson, Nerys T. (1991). Cattle Lords and Clansmen: The Social Structure of Early Ireland. Garland Press. ISBN 9780268008000.
- Rankin, David (2002). Celts and the Classical World. Routledge. ISBN 1134747217.
- Richards, Eric (1999). Patrick Sellar and the Highland Clearances: Homicide, Eviction and the Price of Progress. Edinburgh University Press. ISBN 9781902930138.
- Tanner, Marcus (2006). The Last of the Celts. Yale University Press. ISBN 9780300115352.
- Thornton, David E. (2003). Kings, Chronologies, and Genealogies: Studies in the Political History of Early Medieval Ireland and Wales. Occasional Publications UPR. ISBN 1900934094.
- Welch, Robert (1992). Irish Writers and Religion. Rowman & Littlefield. ISBN 0389209635.
- Watson, Moray (2010). The Edinburgh Companion to the Gaelic Language. Edinburgh University Press. ISBN 0748637095.
- Woolfe, Alex (2007). From Pictland to Alba, 789-1070. Edinburgh University Press. ISBN 0748612335.
- Foras na Gaeilge – Irish agency promoting the language
- Bòrd na Gàidhlig – Scottish agency promoting the language
- Culture Vannin – Manx agency promoting the language
- The Columba Project – Pan-Gaelic cultural initiative