O'Reilly is a common Irish surname. The O'Reillys were historically the kings of East Bréifne in what is today County Cavan. The clan were part of the Connachta's Uí Briúin Bréifne kindred and were closely related to the Ó Ruairc (O'Rourkes) of West Bréifne. O'Reilly is ranked tenth in the top twenty list of most common Irish surnames. It is also the patronymic form of the Irish name Reilly. The name is commonly found throughout Ireland, with the greatest concentration of the surname found in County Cavan followed by Longford, Meath, Westmeath, Fermanagh and Monaghan, and the Province of Leinster.
Fitzpatrick is an Irish surname that most commonly arose as an anglicised version of the Irish patronymic surname Mac Giolla Phádraig "Son of the Devotee of (St.) Patrick".
O'Connor is a surname. Notable people with the surname include:
Clancy is an Irish name coming from the Gaelic Mac Fhlannchaidh/Mac Fhlannchadha, meaning "Son of the red/ruddy warrior", or as a hypocorism for Clarence. The surname originated from two different families, one in Thomond and one in the present day County Leitrim.
Nolan is a surname, of Irish origin from Ó Nualláin, derived from Irish nuall meaning "noble, famous" combined with a diminutive suffix. According to historian C. Thomas Cairney, the O'Nolans in Ireland were one of the chiefly families of the Loígis tribe who in turn came from the Cruthin tribe who were the first Celts to settle in Ireland from between 800 and 500 BC.
MacDonnell, Macdonnell, or McDonnell is a surname of Scottish and Irish origin. It is an anglicized form of the Gaelic patronymic Mac Dhòmhnaill, meaning "son of Dòmhnall". The Gaelic personal name Dòmhnall is a Gaelicised form of the name Donald, which is composed of the elements domno, meaning "world", and val, meaning "might" or "rule". The name is considered a variation of MacDonald.
Dillon is an Irish surname of Breton origin, descending from a cadet branch of Viscomte de Leon in Northern Brittany. It first appeared in Ireland with the arrival of Sir Henry de Leon, in the service of Prince John in 1185. Sir Henry married Maud de Courcy, daughter of Sir John de Courcy and Affrica Guðrøðardóttir. Awarded large tracts of land by in Meath and Westmeath, one of the Dillons’ first Mott & Baileys can still be found at Dunnamona before the establishment of stone structures such as Portlick Castle.
Foley is a surname which originated in Ireland, in the southeast Munster region. The name is derived from the original modern Irish Ó Foghlú and older Irish Ó Foghladha, meaning "plunderer". The Lord of the Decies was a title attributed to some early Foleys.
Johnston is in most cases a toponymic surname derived from several places in Scotland. Historically, the surname has been most common throughout Scotland and Ireland.
Burke is a Norman-Irish surname, deriving from the ancient Anglo-Norman and Hiberno-Norman noble dynasty, the House of Burgh. In Ireland, the descendants of William de Burgh had the surname de Burgh, which was gaelicised in Irish as de Búrca and over the centuries became Búrc, then Burke, and Bourke.
Holland is an English habitational name from Holland, a division of Lincolnshire, or any of the eight villages in various parts of England so called, from Old English hōh ‘ridge’ + land ‘land’.
Kelly is a surname of Irish origin. The name is a partially anglicised version of older Irish names and has numerous origins, most notably from the Ui Maine. In some cases it is derived from toponyms located in Ireland and Great Britain; in other cases it is derived from patronyms in the Irish language.
Harrington is an English habitational name from places in Cumbria, Lincolnshire, and Northamptonshire. It is also a common surname in southwest Ireland, where it was adopted as an Anglicized form of the Gaelic surnames Ó hArrachtáin and Ó hIongardail. Notable people with the surname include:
Dwyer is an Irish surname which is a slightly anglicised variation of O'Dwyer. It is said that people with the surname Dwyer and who come from Ireland all come from the same clan.
Humphreys is a common surname. Notable people with the surname include:
Cummins is a surname. Notable people with the surname include:
McKenna is an Irish surname. It derives from the Gaelic name Cináed, meaning, “born of fire.” It is the anglicized form of the Gaelic Mac Cionaodha meaning "son of Cionnaith", or of the Scottish surname, from Galloway, "MacCionaodha".
Hennessy is an Irish surname, being the anglicised form of Ó hAonghusa.
Kearney or Kearneys is an Irish surname.
Quinn is an Anglicised form of the Irish Ó Coinn or Mac Cuinn. The latter surname means "descendant of Conn". The surname Quinn is also rendered Ó Cuinn or Mac Cuinn in Irish. The surname is borne by several unrelated families in Ireland, especially in the northern province of Ulster and also the counties of Clare, Longford, and Mayo. According to the historian C. Thomas Cairney, the O'Quins were part of the Conmaicne Rein tribe in Ireland who came from the Erainn tribe who were the second wave of Celts to settle in Ireland from about 500 and 100 BC. The most notable family of the name are that of Thomond, a Dalcassian sept, who derive their surname from Niall Ó Cuinn who was slain at the Battle of Clontarf in 1014. This family was formerly represented by the Earls of Dunraven. Another family is that seated in Annaly, who were related to the O'Farrell lords of Longford. Another Quinn family was seated at An Chraobh, County Tyrone and they were related to the O'Neill Kings of Tír Eoghain and for whom they acted as Hereditary Quartermasters. Other families include one seated in Antrim; one seated in Raphoe; and one called Clann Cuain, seated near Castlebar. In the seventeenth century, the surname Quinn was common in Waterford. In 1890, the surname was numerous in Dublin, Tyrone, Antrim, and Roscommon. Quinn is one of the twenty most common surnames in Ireland. the surname Quinn is sometimes associated with Catholics, while Quin is associated with Protestants.
