|The Clan Mulcahy|
|Gaelic Form||Ó Maolchathaigh|
|Chieftainship||No Chiefly lines remain|
|Heraldry||A Silver Yew Tree, A Silver Fawn|
Mulcahy is a surname and Clan of Irish Gaelic origin. The anglicized form of "Ó Maolchathaigh" which in Gaelic means "a descendant of a devotee of Cathach". According to most sources the family originated in County Waterford. However the earliest mention of the family appears in the Annals of Inisfallen in 1317 AD and subsequent references in and around the Churches of County Kerry in the 15th century may point to a connection with the nearby monastic community of Inis Cathaigh in the Shannon estuary.
The Clan Mulcahy is currently represented by The Clan Mulcahy Association. This Association makes it clear that it does not consider itself a 'Clan' in the historical sense; but rather "as a portal for the sharing and celebration of the history of the honorable name of Mulcahy and its many variant spellings". The Association has expressed dissatisfaction with modern Clan Groups who purport themselves as authentic continuations of historical entities. In historical times, Clans were defined as "a unilineal (in the Irish case, patrilineal) descent group forming a definite corporate entity with political and legal functions". They were not - as is often thought - large communal groups comprised solely of individuals sharing a common surname. Most people living in medieval Ireland would not have belonged to any Clan. Even if they shared the surname of a powerful lineage, this would not have been a qualifying criteria for membership of the Clan in any meaningful sense. The Clan Mulcahy Association currently recognizes no Chiefly lineages under the Mulcahy name.
The Mulcahy surname most likely has some connection with the monastic community of Inis Cathaigh. It was common practice for ambitious lineages in medieval Ireland to send their sons to be educated at monasteries. This connection between Church and Clan would be an important link in the future fortunes of a dynasty. The Church offered Clans moral and political advantage in a world where few had the ability to read or write. Lineages who became involved with church affairs could often profit hugely from the wealth the monasteries brought into their territories.
The Uí Mhaolchathaigh Sept appears to have been active in the 15th century in the Churches of Co. Kerry. Benefices were granted by Papal decree to a number of the Sept including the Vicarages of Killarney, Ardfert and Aghadoe. Evidence of nepotism in the control of these Benefices is also apparent supporting the notion that the family had developed a political hold on the offices without having even been ordained as Priests. The Annalistic record for a Giolla Moenaig Ó Maolchatha in the Annals of Inisfallen in 1317AD combined with the above mentioned appointments of the Vicarages would support the idea that the Uí Mhaolchathaigh of Co. Kerry had developed into a modest ecclesiastical dynasty.
The surname is of ecclesiastical origin. The name means a descendant of a devotee of Cathach possibly referring to the monastery of Inis Cathaigh or a descendant of Maolchathach from an individual by that name. The name does NOT mean Warlike as often thought.
There exists a popularly circulated theory regarding the Mulcahy families origins. The theory first proposed by John O'Hart claims that the Mulcahy family descend from the O'More of Laois. O'Hart makes mention of a John O'More who he claims was a younger brother of Rory Caech O'More and who adopted the surname Maolcatha. This theory is almost certainly wrong. O'Hart, intentionally or unintentionally had attributed the origins of the Mulcahy family with O'More on the basis of the name which John O'More had adopted. The name John O'More adopted was not Maolchatha as O'Hart had claimed but Actually Maolchathail, and it is from him that the County Laois sept of Ó Maolchathail usually anglicized Mulhall, claim descent. It should also be noted that, no substantial evidence exists to support the notion that Rory Caech O'More even had a brother named John, making even the claim of the Mulhall family suspect.
To this day many commercial heraldic outlets continue to pass the traditional arms of the O'More family of Laois, which are "Vert a lion rampant or in chief three mullets of the last", off as those of Mulcahy when there is clearly no connection between the two families.
Any Chiefly line for the Mulcahy sept seems to have become extinct relatively early on. Turbulent political events such as the Tudor reconquest and the reformation greatly effected the Irish church and those dependent on it. A number of scant references exist from medieval sources that suggest a County Kerry branch of the family had established something of a political dynasty within the Monastic communities of the region. A County Waterford/Tipperary branch had for a long time been thought of as the senior branch of the Family. However this seems to come from unreliable sources such as O'Harts Pedigrees which falsely traces the line back to the O'More's of Co. Laois.
An individual had recently come forward claiming Chiefly status by means of ad hoc Derbfine, however in a statement issued on the website of The Clan Mulcahy Association, the individual in question declared that he no longer wishes to claim the position, citing dissatisfaction with he authenticity of the 'ad hoc' system. The Uí Mhaolchathaigh sept has no reliably recorded Chiefly lineages.
- Ballyogaha (Baile Uí gCathaigh), in County Cork, which may or may not have had some connection with the family
- Mulcahy Middle School, a middle school in the San Joaquin Valley in California
- Mulcahy Stadium, a baseball stadium in Anchorage, Alaska
- Alan Mulcahy (born 1983), Irish professional football player
- Anne M. Mulcahy (born 1952), American businesswoman, chairman and CEO of Xerox
- Dan Mulcahy (1882-1953), Australian politician
- John Joseph Mulcahy, American Roman Catholic bishop
- Denis Mulcahy (born 1956), Irish hurling player
- Francis P. Mulcahy (1894-1973), United States Marine Corps general and commander during World War II.
- Geoffrey Mulcahy (born 1942), British businessman with Kingfisher plc
- Hugh Mulcahy (1913–2001), American professional baseball player
- John Mulcahy (1876–1942), American Olympic double scull rower in the 1904 Olympics
- Kevin V. Mulcahy (born 1945), American professor and culture scholar
- Mark Mulcahy (contemporary), American jangle-pop musician in the 1980–90s
- Mark Mulcahy (contemporary), Movie Industry Executive 1981–Current
- Michael Mulcahy (born 1952), Irish expressionist painter
- Michael Mulcahy (born 1960), Irish Fianna Fáil party politician; TD for Dublin South-Central
- Pat Mulcahy (born 1975), Irish hurling player
- Richard Mulcahy (1886–1971), Irish politician, leader of Fine Gael and Cabinet Minister; Chief of Staff of the IRA
- Russell Mulcahy (born 1953), Australian film director
- Tomás Mulcahy (born 1963), Irish hurling player
- Thomas Michael Mulcahy (born Jan 1901), Secretary Canterbury Hospital and Australian Labour Party Member.
- Fictional person
- Father Mulcahy, character in the film and television show M*A*S*H
- Annals of Inisfallen, Entry 1317.7 . P.427,
- Nicholls, K.W. Gaelic and Gaelicised Ireland in the Middle Ages. Liliput Press, Dublin.
- Lateran Regesta 728: 1473 Pages 342-345
- Lateran Regesta 799: 1479-1480 Pages 680-686
- J. O'Hart, Irish Pedigrees, Stem of the Irish Nation
- The General armory of England, Scotland, Ireland, and Wales, p. 715
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