O Coolican -  Mac Cord 

O Coolican or O Coolahan. See O Cuolahan.

O Coolihan or O Couolihan or O Cuolihan - Irish / Ua Culichain. 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. Ancestors: 90.Fiachra the second Dal Cuinn King of Connacht ancestor of the Ui Fiachrach Septs, *89.Eochy Mugmedon the 124th King of Tara / Ireland.

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

 O Coombes. Heberian Dal gCais Ui Bloid Sept / Family branch, who had their territory in Co. Clare in the north - west of the Munster Province, who are directly descended from 96.Aodh Caomh -  the Comely / the Gentle,  who was the King of Munster and the first Christian King of the Family, and the eldest son of 95.Conall. Ancestors: 96.Aodh Caomh the King of Munster, 95.Conall, 94.Eochy / Eochaidh Baill Dearg, 93.Cairthenn Fionn  Oge Mor, 92.Blood / Blod ancestor of the Ui Bloid Septs, 91.Cas the King of Thomond and ancestor of all of the Dal gCais Septs.

O Coomey or O Cumey - Irish / Ui Cormaidhe. Heremonian Ui Cobhthaigh Dal Cuinn Colla Uais Ui Mheic Uais Breg Sept / Family branch, who had their territory at Upper Kells / Lower Navan in Co. Meath in the south - east of Northern Leinster. Especially see O Cormie.

O 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 and Co. Cavan in Southern Ulster. They were also in Co. Cork in Desmond /  Southern Munster.  See also next entry.

Coomey. See also Comey.

Coon. See Cunningham.

O Coonaghan. See O Counihan.

O Coonan - Irish / Ua Cuanain - cuan (elegant). A Sept / Family branch, who had their territory in Co. Sligo in the north - west of the Connacht Province and now in Co. Offaly in the north - west of Southern Leinster and the north of Co. Tipperary in the north - east of Ormond / North Eastern Munster. O Conan also used as a variant.

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 Thomond / Tuaiscert Mhumhain / Northern Munster and nearby to the north - east in the south - east at Ballycooney in Co. Roscommon and Co. Galway in Southern Connacht.

O Coonlaghty. See O Couloughty.

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

Coote or Coot (a bird.) Anglo origins who were the English Earls of Bellamont who had their Estate in Co. Cavan in Southern Ulster in the Heremonian Dal Cuinn Ui Briuin Breifne kingdom of East Breifne and Co. Laois in the mid - west of Southern Leinster since 1600 AD.

Cope -

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

Copley. English toponymic origins in Co. Cork in Desmond / Southern Munster since 17th Century AD.

Coppinger. Danish origins in Co. Cork in Desmond / Southern Munster since the early 14th Century AD.

Coply -

Corbally. English Barons who had their Estates in Meath / Midhe in Northern Leinster.

Corbally or Corballis. From an Irish place name were in Co. Louth in the north - east of Northern Leinster.  

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

Corbett / Corbet. Anglo - Norman origins who 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 and O Corribeen in Co. Galway and Co. Mayo in the south - west of Connacht, which see.

O Corby. A Sept / Family branch, who had their territory in the west of Co. Cork in Des Mhumhain / Desmond / Southern Munster. Not connected to Mac Corby.

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

O Corcoran or O / Mac O Cochrane or O Coghranes or O Corkery or O Corkin - Irish / Ua Corcrain - corcra / corcair (purple).  Heberian Cianachta Sept / Family branch, who had their original territory in Co. Offaly in the north - west of Southern Leinster and were Chiefs of Muintir Corcrain nearby in Co. Tipperary at Clare Ruaine in the north of Aur Mhumhain / Ormond / North Eastern Munster of the Clann Ruainni in Ely O Carroll Country. They were also an Ecclesiastical Sept / Family branch, who had territory at Cleenish in Co. Fermanagh in the south - west of the Ulster Province near Loch Erne, where they were Abbots of Devenish / Daimhinis. After the Anglo Norman English Invasion in the late 12th Century AD the O Corcoran Septs were scattered with some going into Carbery in Co. Cork, and Co. Waterford, while those remaining in Co. Kilkenny received a portion of their original territory from the Anglo - Norman Fitz Walter Le Butlers. Ancestors: 84.Ailill Oluimm the 1st King of Munster. 85.Cian // Keen the direct male line ancestor of all of the Cianachta Septs and the father of 86.Teague / Tadhg mac Cian the father of 87.Conla, who had a brother 87.Cormac Galeng the direct male line ancestor of the O Haras and O Garas of Co. Sligo and Co. Mayo in their kingdom of Leyney in the Connacht Province, the O Caseys, the O Brogans, the O Downs, the O Henaghans and the O Hallys / O Allys / O Halls, the father of 88.Iomchadh Uallach, who had a brother 88.Fionnachta the ancestor of the O Meaghers / O Mahers, and the father of; 89.Sabhran the father of; 90.Iomchadh, who had a brother Fec the ancestor of the O Flanagans of Ely and the O Connors of Cianacht / Keenaught in Co. Derry in the Ulster Province, and  the father ; 91.Earc the father of 92.Eile Righ Dearg - the Red King after whom their kingdom of Eile / Duiche Eiligh (The territory of 92.Ely) is named, who is also the direct male line ancestor of the O Healys / Ui hEiligh, and the father of 93.Druadd the father of 94.Amruadh the direct male line ancestor of the Ui hAmridh Sept and the O Corcorans / Coghranes / Ui Corcrain,

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

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