Browse Surnames

Ó Conchobhair is the original Irish Gaelic form of the prominent surname anglicized as O'Connor, meaning "descendant of Conchobar." It is a patronymic surname deeply rooted in Irish history and mythology, associated with...

Ó Conghalaigh is a Gaelic Irish surname, most widely known in its anglicized form Connolly. The name derives from the Irish Ó Conghalaigh, meaning "descendant of Conghalach." Conghalach itself is a personal name derived...

O'Connell is a noble surname of Irish origin, being an Anglicized variant of Connell. It derives from the Irish Ó Conaill, meaning "descendant of Conall." The personal name Conall itself comes from the Old Irish elements...

O’Connor is a prominent Irish surname, representing the anglicisation of the Gaelic Ó Conchobhair, meaning "descendant of Conchobar." The root name Conchobar itself derives from Old Irish elements cú "hound, dog, wolf" (...

Ó Corcráin is an Irish Gaelic surname, originally spelled with a fada (accent) over the 'a'. It is the direct source of the anglicized surname Corcoran. The name means "descendant of Corcrán," where Corcrán is a personal...

Ó Corra is an Irish surname meaning "descendant of Corra", where the given name Corra itself means "spear" in Irish. This Gaelic patronymic surname originates from the ancient Irish naming tradition, where the prefix "Ó"...

Ó Corraidhín is an Irish Gaelic surname, representing the original Gaelic form of the anglicized surname Curran. The name is derived from the personal name Corraidhín, which likely means "little spear"—from Irish corra "...

Ó Cruadhlaoich is an Irish Gaelic surname, the original form of the anglicized surname Crowley 1. The name derives from the Irish patronymic Ó Cruadhlaoich, meaning “descendant of Cruadhlaoch”. The given name Cruadhlaoch...

Ó Cuaig is an Irish Gaelic surname, the original form of the anglicized Quigg. It means "descendant of Cuaig," with Cuaig being a personal name of uncertain etymology. The surname is historically associated with County M...

Ó Cuana is an Irish Gaelic surname, equivalent to the Anglicized Cooney. The name originally meant "descendant of Cuana", where Cuana is a personal name derived from the Gaelic word for "handsome, elegant" or "comely". I...

Ó Cuidighthigh is an Irish patronymic surname meaning "descendant of Cuidightheach". The root name Cuidightheach is an Irish byname derived from the word cuidigh, meaning "help" or "helpful". This name traces back to med...

Ó Cuilinn is a Gaelic Irish surname meaning “descendant of Cuileann”, where Cuileann is a nickname meaning “holly”. The name reflects Ireland’s strong connection between personal nicknames based on nature and later hered...

Ó Cuinn is the Irish Gaelic form of the surname Quinn, a name that has become common in both Ireland and the diaspora. Like many Irish surnames, Ó Cuinn means "descendant of Conn," referring to a male ancestor named Conn...

Ó Cuinneagáin is an Irish surname that represents the original Gaelic form of the anglicized name Cunningham. It is derived from the Irish Gaelic Ó Cuinneagáin, meaning 'descendant of Cuinneagán'. The personal name Cuinn...

Etymology and OriginsÓ Cuirc is an Irish Gaelic surname, originating as a patronymic meaning "descendant of Corc." The personal name Corc derives from the Old Irish word for "heart," reflecting a tradition of naming afte...

Ó Dálaigh is an Irish Gaelic surname, the original form of the Anglicized surname Daly and its variant Daley. The name is derived from the patronymic prefix Ó meaning "descendant of" and the personal name Dálach, making...

Ó Damháin is an Irish surname meaning "descendant of Damhán". Damhán itself derives from Old Irish Damán, meaning "calf, fawn," which comes from the Celtic root dam, meaning "ox, deer," combined with a diminutive suffix....

Ó Deasmhumhnaigh is a traditional Irish Gaelic surname, anglicized as Desmond. The name derives from the region of Desmond in southern Ireland, historically known as "south Munster" (from Irish Deasmhumhain). The surname...

EtymologyÓ Deoradháin is the Irish Gaelic form of the surname Doran. It belongs to the widespread Gaelic tradition of surnames beginning with Ó, meaning "descendant of." The name originates from the byname Deoradhán, whi...

Ó Díomasaigh is the original Irish Gaelic form of the surname Dempsey. Deriving from the Gaelic prefix Ó meaning "descendant of" and the personal name Díomasach, the surname literally translates to "descendant of Díomasa...

Ó Dochartaigh is the original Irish Gaelic form of the surname Doherty. It is a patronymic name meaning "descendant of Dochartach", with the Gaelic mac or ó (abbreviated from ua) indicating lineage. The personal name Doc...

Ó Doibhilin is an Irish Gaelic surname, a patronymic form meaning "descendant of Doibhilin." The name originated in Ireland and is found in historical records primarily in the northern counties, particularly Donegal and...

Ó Doirnáin is an Irish Gaelic surname that serves as the original Irish form of the anglicized surname Durnin. The name originates from the Gaelic Ó Doirnáin, meaning "descendant of Doirnín," where Doirnín is a personal...

Ó Domhnaill is the original Irish Gaelic form of the surname O'Donnell, meaning "descendant of Domhnall." The name Domhnall itself is the Irish form of Donald, derived from the Old Irish elements domun "world" and fal "r...

Ó Donnchadha is an Irish Gaelic surname, derived from the personal name Donnchadh. It originates as a patronymic, meaning 'descendant of Donnchadh'. The name is ultimately rooted in the Gaelic elements donn 'brown' and c...

Ó Donndubháin is an Irish Gaelic surname that serves as the original form of the Anglicized surname Donovan. It belongs to the class of Irish patronymic surnames prefixed with Ó, meaning 'descendant of'. The name is hist...

O'Donnell is an Irish surname, derived from the Gaelic Ó Domhnaill, meaning "descendant of Domhnall," which is the Irish form of Donald. The name Donald itself comes from the Scottish Gaelic Dòmhnall, composed of the Old...

Ó Donnghaile is the original Irish Gaelic form of the anglicized surname Donnelly. It is a patronymic name derived from the Old Irish Ua Domhnaill, meaning "descendant of Donnghal". The personal name Donnghal is composed...

O'Doyle is an Irish surname, a variant of the more common Doyle. Like Doyle, it is an Anglicized form of the Irish patronymic Ó Dubhghaill, meaning “descendant of Dubhghall.” The O'Doyle form arose as a back-formation fr...

Ó Dubháin is an Irish Gaelic surname, the direct source for the anglicized form Duane. The name means “descendant of Dubhán,” where the prefix “Ó” denotes patrilineal descent in Irish naming conventions.Etymology and Ori...

Ó Dubhghaill is an Irish Gaelic surname, the original form of the Anglicized Doyle. It translates as “descendant of Dubhghall,” from the personal name Dubhghall (also appearing in Scottish Gaelic). The name Ó Dubhghaill...

Ó Dubhshláin is an Irish Gaelic surname, the original form of the anglicized Dolan. The name means "descendant of Dubhshláine". The personal name Dubhshláine is derived from Old Irish dub meaning "dark, black" and either...

Ó Dubhshláine is the original Irish Gaelic form of the Anglicized surname Delaney. It means "descendant of Dubhshláine," a personal name derived from Old Irish dub meaning "dark" or "black" combined with either slán mean...

Ó Dubhthaigh is an Irish Gaelic surname, most commonly anglicized as Duffy. It originates from the Irish Ó Dubhthaigh, meaning "descendant of Dubthach." The name Dubthach itself is derived from the Old Irish element dub...

Ó Duibh is an Irish surname meaning "descendant of Dubh," where Dubh is an Irish byname meaning "dark" or "black." It is part of the Gaelic patronymic naming tradition, where Ó indicates "grandson" or "descendant." This...

Ó Fallamháin is an Irish Gaelic surname that serves as the original form of the English surname Fallon. This patronymic surname, meaning "descendant of Fallamhán," reflects the rich onomastic tradition of ancient Ireland...

Ó Faoláin is an Irish Gaelic surname whose literal meaning is "descendant of Faolán." It is closely related to the anglicized forms Whelan and Phelan, which are common in Ireland and among the Irish diaspora. Origin and...

Ó Fearghail is an Irish Gaelic surname representing the original form of the Anglicized surname Farrell. It is a patronymic surname meaning "descendant of Fearghal", which itself derives from the Old Irish elements fer "...

Ó Fionnagáin is the original Irish Gaelic form of the surname Finnegan. It derives from the Gaelic Ó Fionnagáin, meaning “descendant of Fionnagán,” where Fionnagán is a personal name formed from Fionn (meaning “fair” or...

Ó Fionnáin is an Irish Gaelic surname meaning "descendant of Fionn." It is the original Irish form of later anglicized surnames such as Fannon and Finn. The name is deeply rooted in Irish legend, as Fionn (also spelled F...

Ó Flannagáin is an Irish Gaelic surname that serves as the original form of the Anglicized Flanagan. Derived from the Old Irish element flann meaning "blood red" or "ruddy," combined with a diminutive suffix, the name li...

Ó Flannghaile is the original Irish Gaelic form of the anglicized surname Flannery. It is a patronymic surname, meaning that it derives from an ancestor's given name, formed with the prefix Ó, indicating "grandson" or "d...

Ó Floinn is an Irish surname, historically borne by the descendants of a Norse-Gaelic kindred. It is the original Gaelic form of the better-known anglicized surname Flynn, both derived from the Old Irish personal name or...

Ó Foghladha is the original Irish Gaelic form of the surname Foley. It is an Irish patronymic name, meaning “descendant of Foghlaidh,” derived from a personal byname that denoted “pirate,” “marauder,” or “plunderer.” The...

Ó Frighil is an Irish surname, the Gaelic form of Friel. The name originates from the Irish Gaelic Ó Frighil, meaning "descendant of Fearghal," which itself derives from the Old Irish name Fergal, composed of elements me...

Ó Gallchobhair is the original Irish Gaelic form of the surname Gallagher, deeply rooted in the history of County Donegal, Ireland. Derived from the given name Gallchobhar (from Old Irish gall 'stranger' and cobar 'desir...

Ó Gormáin is an Irish surname with deep roots in Gaelic culture, representing the original form of anglicized versions such as Gorman and O'Gorman. It is derived from the Old Irish patronymic formula Ó meaning "grandson"...

Etymology & OriginsO'Gorman is an Irish surname, a variant of Gorman 2, which itself derives from the Irish Ó Gormáin meaning "descendant of Gormán." The given name Gormán translates to "little blue one"—likely a referen...

Ó Gráda is an Irish Gaelic surname, the anglicized form of which is Grady. The root of both surnames is the byname Gráda, meaning "noble" or "illustrious" in Irish. The prefix Ó indicates "descendant of", so Ó Gráda tran...

Ó hAllmhuráin is the original Irish Gaelic form of the Anglicized surname Halloran. Derived from the Irish patronymic Ó hAllmhuráin, it means “descendant of Allmhurán,” a given name that translates to “stranger from acro...

O'Hanegan is a variant of the Irish surname O'Hannagain. The name originates from the Gaelic Ó hAnnagáin, meaning 'descendant of Annagán'. The personal name Annagán is a diminutive of Annadh, which translates to 'delay'....

O'Hanigan is an Irish surname, a variant of O'Hannigain, which itself derives from O'Hannagain. The root form, Ó hAnnagáin, means "descendant of Annagán," where Annagán is a diminutive of the personal name Annadh, meanin...

O'Hannagain is an Irish surname derived from the Gaelic Ó hAnnagáin, meaning "descendant of Annagán." The personal name Annagán is a diminutive of Annadh, which translates to "delay." This suffix implies endearment or sm...

Ó hAnnagáin is an Irish Gaelic surname, the original form of the Anglicized surnames O'Hannagain and its variants. The name derives from Ó hAnnagáin, meaning "descendant of Annagán." The personal name Annagán is a diminu...

OverviewO'Hannagan is a variant of the Irish surname O'Hannagain, derived from the Gaelic Ó hAnnagáin meaning "descendant of Annagán." The personal name Annagán is a diminutive of Annadh, which means "delay" in Irish. Th...

O'Hannegan is an Irish surname, a variant of O'Hannagain. The original Gaelic form is Ó hAnnagáin, meaning "descendant of Annagán". The personal name Annagán is a diminutive of Annadh, which signifies "delay" in Irish.Et...

O'Hannigain is a surname of Irish origin, a variant form of O'Hannagain. The root name, O'Hannagain, derives from the Irish Ó hAnnagáin, meaning "descendant of Annagán." The given name Annagán is a diminutive of Annadh,...

O'Hannigan is an Irish surname, a variant of O'Hannagain. The surname originated from the Irish Ó hAnnagáin, meaning "descendant of Annagán". The personal name Annagán is a diminutive of Annadh, which translates to "dela...

Etymology and OriginsÓ hAodha is a Gaelic-Irish surname that has commonly been Anglicized to Hayes or Hughes. The name derives from the personal name Aodh, meaning "fire" in Old Irish. Aodh was a highly popular name in e...

Ó hAonghuis is an Irish surname, the original Gaelic form of the Anglicized Hennessy. It means "descendant of Aonghus," with Aonghus being a name of ancient Irish mythology and history. Etymology The surname Ó hAonghuis...