Donoghue, O'Donoghue or O'Donojú is an anglicized form of the Irish language surname Ó Donnchadha or Ó Donnchú.
The name means means "descendant of Donnchadh", a personal name composed of the elements donn "brown-haired [man]" and cath "battle". Spelling variations (which include an initial "Ó" or omit it) include Donoghue, Donaghoe, Donoughe, Donaho, Donahoe, Donough, Donahue, Donahow, Doneghoe, Donehue, Donighue, Donoho, Donohoe, Donahugh, Donohough, Donohow, Donahue, Donohue, Donaughue, Donaghie, Donaghy, Doughue, Dougue, Donihoo and many more. Some of these variations exist also in Northern Ireland and Scotland with the same meaning in Scottish Gaelic as in Irish.
There are several completely different O'Donoghue families in Ireland.
- (1) The Ó Donnchadha of Cashel, from the Eóganacht Chaisil, related to the MacCarthys and O'Callaghans. They descend from Donnchad mac Cellacháin, King of Munster.
- (2) The Ó Donnchadha of Desmond, from the Eóganacht Raithlind, related to the O'Mahonys, prominent in County Kerry and referred to as "O'Donoghue Mór." They descend from Donnchadh mac Domhnall.
- (3) The Ó Donnchadha of Osraige, from the Clann Conla, related to the Mac Giolla Phádraig dynasty ("the Fitzpatricks") and produced some kings of Osraige, prominent in County Kilkenny and commonly anglicised as Dunphy. They descend from Donnchad mac Gilla Pátraic.
- (4) The Ó Donnchadha of Uí Maine, from the Uí Maine, related to the O'Kellys, prominent in County Galway and County Roscommon.
People with the surname O'Donoghue
- Bernard O'Donoghue, Irish poet and academic
- Charles Henry O'Donoghue, zoologist
- Daniel O'Donoghue, Irish politician
- Daniel John O'Donoghue, Ontario labour leader and political figure
- Florence O'Donoghue, Irish historian and intelligence specialist
- Geoffrey Paul Vincent O'Donoghue of the Glens
- John O'Donoghue (politician), Irish Fianna Fáil politician, former cabinet minister and former Ceann Comhairle
- Juan O'Donojú, Spanish military officer and last Viceroy of New Spain
- General Sir Kevin O'Donoghue KCB CBE, the first Chief of Defence Materiel in the United Kingdom Ministry of Defence
- Kevin O'Donoghue, Artist Educator at Clonkeen College
- Martin O'Donoghue, Irish economist and Fianna Fáil politician
- Patrick O'Donoghue, Irish-born current Bishop Emeritus of the Roman Catholic Diocese of Lancaster, England
- Peter O'Donoghue, herald at the College of Arms in London, England
- Tighe O'DonoghueRoss, Artist and Sculptor
- David James O'Donoghue, Journalist and Author
- In entertainment, sports, activism
- Ben O'Donoghue, Australian celebrity chef
- Colin O'Donoghue, Irish actor currently acting at Once Upon A Time
- Danny O'Donoghue, lead singer of the Irish band "The Script"
- Ed O'Donoghue, Irish Rugby Union player
- John E. O'Donoghue, Major League Baseball pitcher
- John P. O'Donoghue, Major League Baseball pitcher
- Lowitja O'Donoghue, Aboriginal Australian civil and political rights activist
- Michael O'Donoghue, Irish-American comedian, writer and occasional performer for Saturday Night Live
- Nan Joyce née O'Donoghue, Irish Travellers' right activist
- Neil O'Donoghue, former NFL kicker
- The Scottish Clan Robertson, anciently known as Clann Dhonnchaidh, 'Children of Donnchadh' is of separate origin, though of the same elemental meaning in Scots Gaelic.
- Donoghue (disambiguation)
- Irish nobility
- Ross Castle
- Other Munster families
- McGillycuddy of the Reeks and/or O'Sullivan Mor
- O'Brien, Prince of Thomond
- O'Grady of Kilballyowen
- Byrne, Francis J., Irish Kings and High-Kings. Four Courts Press. 2nd edition, 2001.
- Curley, Walter J.P., Vanishing Kingdoms: The Irish Chiefs and their Families. Dublin: Lilliput Press. 2004.
- MacLysaght, Edward, Irish Families: Their Names, Arms and Origins. Irish Academic Press. 4th edition, 1998.