McCullough is an Irish surname, with two distinct Gaelic origins:
Derivation from the Irish Gaelic Mac Cú Uladh 'son of the hound of Ulster' is more probable. [3] While Cú Uladh may allude to the legendary Irish figure Cú Chulainn, it was a common given name in medieval Ireland. In Ulster it was often in use by the O'Neills of Clandeboye, the MacMahons of Oriel, the MacCanns, and the MacDonlevy kings of Ulaid. The M[a]cCulloch spelling is more common in Scotland (especially Galloway), and is associated with Clan MacCulloch.
Bradley is an English surname derived from a placename meaning "broad wood" or "broad meadow" in Old English.
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".
Corcoran is an Irish surname, the original Irish language form being Ó Corcráin meaning 'descendant of Corcrán' and MacCorcráin from Leinster meaning Son of Corcrán. The name itself is derived from corcair meaning 'purple'.
M(a)cLaughlin is the most common Anglicized form of Mac Lochlainn, a masculine surname of Irish origin. The feminine form of the surname is Nic Lochlainn. The literal meaning of the name is "son of Lochlann". Note that Mc is simply a contraction of Mac, which is also truncated to M' . Thus, MacLaughlin, McLaughlin and M'Laughlin are the same Anglicism, the latter two merely contractions of the first.
McCulloch is a Scottish surname, commonly found in Galloway, and usually associated with Clan MacCulloch. It may be etymologically related to the Irish surname McCullough.
Cooke is a surname of English and Irish origin derived from the occupation of cook and anglicisation of various Gaelic names. Variants include Cook and McCook.
Keenan is an Irish surname meaning 'ancient, distant' in the Irish language. It is derived from ÓCianáin 'descendant of Cianán'. The Ó Cianáin clan were hereditary historians to the Mac Uidhir.
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.
McCann is an Irish surname. It is derived from the Gaelic Mac Cana meaning "son of Cana". The Irish given name Cana literally means "cub", specifically alluding to a "wolf cub". The Mac Cana were a Gaelic Irish clan who held the lands of Clancann and Clanbrassil, together known as Oneilland, in what is now northern County Armagh. The surname is strongly associated with that part of Ulster.
Orr is a surname of Irish and Scottish origin. It is derived from the Gaelic Odhar meaning "dark, pale". In Scotland, Orr may be a sept of Clan Campbell.
Curry is a common surname used in Ireland, Scotland and England. Currey is a less common variant. In England and Scotland, the is thought to derive from local place names and, in Scotland, also possibly from MacMhuirrich.
McManus is an Irish surname. It is derived from the Irish Gaelic "Mac Mághnais", in modern Irish "McMaghnuis" which means "Son of Magnus". Its earlier origin is from the Latin "magnus", meaning "great". The Normans used it to honour Charlemagne (742–814), as Carolus Magnus. Variant spellings of the name include MacManus, Manus and MacManners. The English form, Moyne, is also found in Ulster. In Scotland it is a sept of Clan Colquhoun.
Hogan is an Irish surname, mostly from County Tipperary. It is the anglicised form of Gaelic ÓhÓgáin ‘descendant of Ógán', a name meaning 'young warrior'. It may also be an anglicised form of Ó hEochagáin (Houghegan). Notable people with the surname include:
McGowan is an Irish and Scottish surname. It is an Anglicization of the Irish Mac Gabhann and Scottish Mac Gobhann, both of which mean 'son of (the) smith'. Belonging to the Uí Echach Cobo, located in modern-day western County Down, Ulster, they were of the same stock as the McGuinness clan.
McNally is an Irish surname originating in County Tyrone, Ulster. It is the Anglicized form of Mac Conallaidh 'son of Cú Allaidh', a Gaelic name of Cenél nEógain meaning the 'wild hound', i.e. 'wolf'.
Kelly is a surname in the English language. The name 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.
Fitzsimons is a surname of Norman origin common in both Ireland and England. The name is a variant of "Sigmundsson", meaning son of Sigmund. The Gaelicisation of this surname is Mac Síomóin or Mac an Ridire.
Morrow is an anglicized surname of Irish or Scottish origins.
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".
The Maguire family is an Irish clan based in County Fermanagh. The name derives from the Gaelic Mac Uidhir, which is "son of Odhar" meaning "dun", "dark one". According to legend, this relates to the eleventh descendant of Colla da Chrich, great-grandson of Cormac mac Airt, who was monarch of Ireland about the middle of the third century. From the 13th to the 17th centuries, the Maguire family were kings of Fermanagh.