O Coolihan or O Couolihan - Irish - Ua Culichain. A Heremonian Ui Cobhthaigh Dal Cuinn Ui Fiachrach Sept - Family branch - who had their territory in Co. Mayo in the mid - west of the Connacht Province. Ancestor *87.Fiachra.

O Cooling - Irish - Ua Cuifhinn. A Sept - Family branch - who had their territory in Co. Wicklow in the south - east of Southern Leinster.

Coomey - Irish - Ua Camtha. A Sept - Family branch - who had their territory in the Heremonian Ui Cobhthaigh Dal Cuinn Ui Briuin kingdom of Breifne in Co. Leitrim in Northern Connacht & Co. Cavan in Southern Ulster. They were also in Co. Cork in Southern Munster. See also next entry.

Coomey - See also Comey.

O Cooney - Irish - Ua Cuana. A Sept - Family branch - who had their original territory in Co. Tyrone in Central Ulster and later nearby in the north of the Connacht Province.

O Cooney - A Sept - Family branch - who had their territory in Co. Clare in the north - west of the Munster Province and nearby to the north in the south - east at Ballycooney in Co. Roscommon & Co. Galway in Southern Connacht.

Cooper - English occupational name. They were among the landed Gentry since the Mid - 17th Century AD in four Counties especially Co. Sligo in the north - west of the Connacht Province.

Coot -

Coote - a bird - Anglo origins. They were in Co. Cavan in Southern Ulster & Co. Laois in the mid - west of Southern Leinster since 1600 AD.

Copeland - They were in Co. Down in the south - east of the Ulster Province.

Copley - English toponymic origins. They were in Co. Cork in Southern Munster since 17th Century AD.

Coppinger - Danish origins. They have been in Co. Cork in Southern Munster since the early 14th Century AD.

Coply -

Corbally - From an Irish place name. They were in Co. Louth in the north - east of Northern Leinster  where Corballis is also used.

Corbane or Corban - Irish - Ua Corbain. A Sept - Family branch - who had their territory in the Munster Province.

Corbett - Corbet - Anglo - Norman origins. They had ravens in their arms and initially came from Shropshire in England. In Ireland it is usually similar to O Corban (e) - Ua Corbain in the Munster Province or O Coirbin in the Connacht Province & O Corribeen in Co. Galway & Co. Mayo in the south - west of Connacht, which see.

Mac Corby or Mac Corboy - Irish - Mheic Corrbhuidhe - cor - crane / buidhe - yellow. A Sept - Family branch - who had their territory in Co. Laois & Co. Offaly in the north - west of Southern Leinster and also nearby in the north of Co. Tipperary in the north - east of the Munster Province.

O Corcoran - Irish - Ua Corcrain - corcra - corcair - purple. An Ecclesiastical Sept - Family branch - who had territory in Co. Fermanagh in the south - west of the Ulster Province near Loch Erne. Also anglicized as Corkery & Corkin, which see. Cochrane also used as a variant.

Mac Corcoran - Irish - Mheic Corcrain - corcair - purple. A Heberian Cianachta Sept - Family branch - who had their territory in Co. Offaly in the north - west of Southern Leinster. They were also Chiefs nearby in Co. Tipperary in the north - east of the Munster Province of the Clann Ruainni in "Ely - O Carroll Country." Cochrane also used as a variant. Ancestor *84.Teague mac Cian, *85.Cian & *37.Heber "Fionn."

Mac Cord - May be a variant of Mac Court, which see, in the Ulster Province.

                                                                                     +On to Cordan - Cornwalsh