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O Cillin

O Cillin is the name of a family now rendered as Killeen, found mainly in County Roscommon, County Mayo and County Galway. It is derived from the saints name Cillian.

O Cobhthaigh

O Cobhthaigh was the name of an Irish Brehon family from what is now County Westmeath and County Longford. There were at least three other families of the name, located in the regions of Limerick-Kerry, Down, west Cork, and Galway.

O Coileain

O Coileain is a Modern Irish surname generally belonging to the descendants of the last leading family of the Ui Chonaill Gabra, a sept and small but notable overkingdom of medieval and ancient Ireland, based in western County Limerick. Throughou ...

O Conghalaigh

O Conghalaigh is a Gaelic-Irish surname. It derives from the forename Conghal, meaning "fierce as a wolf". It is often anglicised as Conly, Conley, Conneely, Conneeley, Connolley, Connelley, Connalley, Connally, Connolly, Connelly, Connely or O C ...

O Cormacain

O Cormacain was mainly found west of the Shannon, in Connacht. The O Cormacain ecclesiastical family were based in Siol Anmchadha, in what is now southeast County Galway. There were at least three or possibly four septs of this name, located in w ...

O Creachmhaoil

O Creachmhaoil is an Irish surname, often anglicised as Craughwell, Croughwell, Crockwell, and Crowell. It was largely unknown outside of the south-east of County Galway, where the village of Creachmhaoil is also found, until the latter end of th ...

O Dalaigh

The O Dalaigh were a learned Irish bardic family who first came to prominence early in the 12th century, when Cu Connacht O Dalaigh was described as "The first Ollamh of poetry in all Ireland". The modern Irish surnames ODaly, Daly, Daley, Daily, ...

O Domhnallain

They held the post of Cathmhaol or Battle Champion of Ui Maine, but by the early 14th century had become poets and brehons. The family took their name from Domnallan mac Maelbrigdi, fl. c. 9th/10th century. Their principal home was at Ballydonnel ...

O Droighneain

O Droighneain was a surname of at least two different septs, located in Counties Cork and Galway, but has been translated as Thornton, an English surname. ". O Droighneain remains in use as an Irish-language surname.

O Flaithbheartaigh

OFlaherty, is an Irish Gaelic clan based most prominently in what is today County Galway. The clan name originated in the 10th century as a derivative of its founder Flaithbheartach mac Eimhin. They descend in the paternal line from the Connachta ...

O hAichir

O h-Aichir is an Irish surname also rendered as O hEithir, O Hehir, OHehir, Hehir, or Hare. It is a sept of Clare which originated with the Ui Fidhgheinte of Limerick.

O hAodha

Now generally anglicised as OHea in County Cork, Hughes or Hayes, O hAodha derives from Aodh, a personal name meaning "fire" popular at all historical times throughout the Gaelic world. It is the surname of at least ten unrelated families found i ...

O hArailt

O hArailt is a masculine surname in the Irish language. The name translates into English as "descendant of Arailt ". The surname originated as a patronym, however it no longer refers to the actual name of the bearers grandfather. There are specif ...

O hEidirsceoil

O hEidirsceoil is a Gaelic Irish clan who were rulers of the Dairine sept of the Corcu Loigde until the Earl Modern period. The name is most prominent in County Cork and County Kerry. Their ancestors were Kings of Munster until the rise of the Eo ...

O hIceadha

The O hIceadha surname is especially associated with the Kingdom of Thomond, where bearers of the name were in successive generations a medical family who were physicians to the clans of the Dal gCais, as well as other premier families of Munster ...

O hUiginn

O hUiginn is the surname of a Gaelic-Irish family of soldiers, poets, and historians located in Connacht. Originally part of the southern Ui Neill based in the Irish midlands, they moved west into Connacht. They were especially associated with wh ...

O Maoilriain

Not to be confused with the Ryan clan of County Carlow. O Maoilriain is an Irish Gaelic clan based in what is today County Tipperary and County Limerick. The clan claims descent from Cathair Mor of the Laighin, but they first appear in the histor ...

O Maolain

O Maolain is a Gaelic-Irish surname usually anglicised as Mullin, Mullins, Mullan, Mullane, Mallon, Moylan, Mullen and Mellon, any of which may have an "O" prefix.

O Maolmhuaidh

Maolmhuaidh is an Irish surname, generally anglicised as Molloy or Mulloy. Like other Irish surnames, Maolmhuaidh is patronymic. The male version is O Maolmhuaidh ; the female versions are Ui Mhaolmhuaidh and Ni Mhaolmhuaidh ; the family or house ...

O Meadhra

The O Meadhra clan were a sept of the Dal gCais, and the name is most common in the dynastys homeland of north-east Thomond nowadays north County Tipperary and adjoining parts of County Clare. The familys home district was centered about Toomevar ...

O Siadhail

There were at least three families of this name in Gaelic Ireland. O Siadhail of Tir Chonaill, now County Donegal. O Siadhail of Ui Maine, now east County Galway. O Siadhail of Ui Failghe, now County Offaly and County Laois. Little is recorded of ...

O Tomhrair

O Tomhrair is a masculine surname in the Irish language. The name translates into English as "descendant of Arailt ". The surname originated as a patronym, however it no longer refers to the actual name of the bearers grandfather. There are sever ...

O Tormaigh

O Tormaigh is a masculine surname in the Irish language. The name translates into English as "descendant of Tormach ". The name Tormach is a Gaelic derivative of the Old Norse personal name Þormodr. A variant form of O Tormaigh is O Tormadha. Ang ...

O Troighthigh

The Ui Troighthigh foot-soldier were natives of Corcomroe. The earliest mention of the family occurs in 1003, when 1003. The slaying of Conchobar son of Mael Sechnaill, king of Corcu Modruad, and of Amlaib, son of Lochlainn, and of Aicher Ua Trai ...

ODonnell dynasty

The ODonnell dynasty were an ancient and powerful Irish family, kings, princes and lords of Tyrconnell in early times, and the chief allies and sometimes rivals of the ONeills in Ulster.

OFriel

OFriel is a surname of Tyrconnell. The origin of the names comes from Firghil O Fearghial or Fergal, a descendant of Eoghan, son of Niall Noigiallach, the most prolific warrior in Irish history brother of St. Columcille, and are thus nearest in d ...

OBoyle Donegal

The OBoyle were a family of the Ui Neill tribe of the Northern Gaels. The Northern ONeill were a great tribal dynasty of the North Gaels. The OBoyles were one of the principal families of the Cenel Conaill within the Ui Neill tribe and originally ...

OByrne family

The OByrne family is an Irish clann that descend from Bran mac Maelmorda, King of Leinster, of the Ui Faelain of the Ui Dunlainge. Before the Norman invasion of Ireland they began to colonise south Wicklow. There are many famous people with this ...

OCollins

OCuilleain or Cuilliaean is an extremely ancient Irish name from Gaelic cuileann and primitive Gaelic cuilieann meaning Holly. In pre-Christian Celtic culture and history, the Holly Tree was regarded as sacred on account of its alleged mystic and ...

ODavoren

The ODavoren Irish: O Duibhdabhoireann family were a scholarly clan of Corcomroe, Thomond modern-day County Clare, Ireland active since medieval times. Famed for their sponsorship of schools and knowledge of history and Early Irish law, the Ui Dh ...

ODea

ODea, contraction of O Deaghaidh, formerly Ua Deaghaidh), is an Irish surname derived from Deaghaidh, the name of a tenth-century clan chieftain.

ODoherty family

The O’Doherty family) is an Irish clan based in County Donegal in the north of the island of Ireland. Like clans in other cultures, Irish clans such as the O’Dohertys are divided into many septs and regional families. In the modern day, there are ...

ODonoghue of the Glens

The ODonoghue of the Glens, Prince of Glenflesk, is the hereditary chieftain of his sept of the Kerry Eoganacht. In 1944, his father was one of the few Chiefs of the Name recognized by Edward MacLysaght, the first Chief Herald, as having a verifi ...

ODowd

ODowd, is an Irish Gaelic clan based most prominently in what is today County Mayo and County Sligo. The clan name originated in the 9th century as a derivative of its founder Dubda mac Connmhach. They descend in the paternal line from the Connac ...

OHeerin

OHeerin is an Irish surname meaning "grandson or descendant of Uidhrin". The OHeerin clan of Leinster originates in the ancient Kingdom of Ui Failghe corresponding to the modern County Offaly, the territory given by the second-century king Cathai ...

OLeary

Although almost nothing is known of their activities for several centuries, the OLearys reappear as a still titled family in the 16th century, and relatively wealthy, although they were subject to the MacCarthy of Muskerry dynasty, from whom they ...

ONeill (surname)

For the histories of the prominent families, please see the article ONeill dynasty. The surname ONeill is an Anglicization of the original Irish Ua Neill, composed of the elements ua, meaning "grandson" or "descendant," and of the Irish name Nial ...

OShaughnessy

O Seachnasaigh, OShaughnessy, collectively Ui Sheachnasaigh, clan name Cinel nAedha na hEchtghe, is a family surname of Irish origin. The name is found primarily in County Galway and County Limerick. Their name derives from Seachnasach mac Donnch ...

OSheehan

The OSheehan family is an Irish clan traditionally of County Clare. Part of the Dalcassian branch of families, the OSheehans themselves played only a small role in Irish politics, as vassals to the more famed OBriens, who commonly became kings of ...

OToole family

The OToole family of Leinster, formerly one of the leading families of that province, are descended from Tuathal Mac Augaire, King of Leinster, who belonged to the Ui Dunlainge dynasty.

Pilkington (surname)

Pilkington is an English surname, and may refer to: William Pilkington architect 1758–1848, English architect Esther Pilkington, British performance artist Rachel Pilkington born 1974, Irish actress Frederick Thomas Pilkington 1832–1898, British ...

Rochfort family

The Rochfort family came to Ireland in the thirteenth century and acquired substantial lands in counties Kildare, Meath and Westmeath. Several members of the family were prominent as lawyers and politicians. They gained the title Earl of Belveder ...

Rowlan

Rowlan is an Irish Surname and the anglicized version of the name O Rothlain English. It, therefore, shares a link with the surnames Rowland, Rowlands, Rollan, Rollin, Rolan, Roland and Rowley.

Sil nAedo Slaine

Sil nAedo Slaine are the descendants of Aed Slaine, son of Diarmait mac Cerbaill. Part of the Southern Ui Neill - they were the kings of Brega - they claimed descent from Niall Noigiallach and his son Conall Cremthainne. With the possible excepti ...

Tribes of Galway

The Tribes of Galway were 14 merchant families who dominated the political, commercial and social life of the city of Galway in western Ireland between the mid-13th and late 19th centuries. They were the families of Athy, Blake, Bodkin, Browne, D ...

Tubridy

You may be searching for Ryan Tubridy or the following programmes associated with him: Tubridy Tonight RTE One, The Tubridy Show RTE Radio 1, Tubridy radio show RTE 2fm. Tubridy, less commonly known as Tubrid and Tuberty, is a Gaelic Irish clan f ...

Ui Lochlainn

The Ui Lochlainn, also known as the OLochlainn family, were a leading kindred in the Burren region of County Clare. The Ui Lochlainn were a branch of the Corcu Mruad. In Irish their surname was Ua Lochlainn and O Lochlainn. Forms of the personal ...

De Vaux family

Robert and Aitard de Vaux followed in the retinue of Roger Bigod during William of Normandys invasion of England. They obtained lands in Norfolk. Hubert de Vaux obtained the barony of Gilsland, in Cumbria and Northumberland. Ranulf de Vaux obtain ...

Verschoyle family

The Verschoyle family were a prominent Irish landed family of Dutch descent. The surname is pronounced in Ireland as "Ver-Skoil" and in England as "Ver-Shoy-Ul".

De Vesci

de Vesci is the surname of an old Norman noble family originating from Vassy, Calvados, also known as the House of de Vesci. The first records are about Robert de Vesci, Norman conqueror and Ivo de Vesci, Lord of Alnwick. The de Vesci family held ...