Mac Cloven. Used as a variant for Cluvane, which see, in Co. Carlow in Southern Leinster.

Mac Clowry. Used as a variant Mac Clory, which see, in Central Southern Leinster.

Mac Cloy - Irish / Mheic Giolla Eochaidh. A Sept / Family branch, who had their territory in Co. Monaghan in Southern Ulster. See also Lee.

Mac Cloy. French Scottish origins (Descended from a son of Lughaidh / Lewy) They were a branch of the Stuarts of Bute who were in Co. Antrim in the north - east of the Ulster Province.

Mac Cloy. May also be the Irish / Mheic Dhuinnshliebhe. An important Irian Sept / Family branch, who had their territory in the Ulster Province where they were Kings. See also - Dunlevy. Ancestor: *37.Ir (Irians).

Mac Cluggage. Highland Scottish origins. They may be the Gaelic Irish / Mheic Lucais from Mac Lucas and its variant Mac Lugash.

O Clumhain - Irish / Ua Clumhain. Anglicized as Colman. A Sept / Family branch, who had their territory in Co. Cork in Desmond / Des Mhumhain / Southern Munster. Also known as Clifford. Also see Cluvane.

Mac Clune - Irish / Mheic Cluin. Originally Mheic Gluin - glun (knee). A Heberian Dal gCais Sept / Family branch, who had their territory at Ballymaclune in Co. Clare in the north - west of Thomond / Tuaiscert Mhumhain / Northern Munster Province. No connected to Mac Cloon and Cluvane. Ancestor: *91.Cas the King of Thomond.  (Dal gCais), *37.Heber "Fionn." (Heberians.)

Mac Clung. Highland Scottish origins. Gaelic / Mheic Luinne / Mheic Luinnge.

Mac Clure. Highland Scottish origins. Gaelic Irish / Mheic Mac Giolla Uidhir. They came from Galloway and were in the Ulster Province.

Mac Clurg. Highland Scottish origins. Gaelic Irish / Mheic Luirg / Mheic an Chleirigh.

Mac Clusker - Irish / Mheic Bhloscaire. May be a variation of Mac Cluskey, which see, who were in Co. Antrim in the north - east of the Ulster Province.

Mac Cluskey - Irish / Mheic Bhloscaidh. A Heremonian Ui Cobhthaigh Ui Felim Dal Cuinn "Northern" Ui Niaill Cenel nEogain Sept / Family branch, who had their territory in Co. Derry in the north - east of the Ulster Province. They were a  Sept of the O Cahans / O Kanes. See also -  Closkey. Ancestor: *88.Eogan the 1st King of Aileach (Cenel nEogain), *87.Niall of the Nine Hostages the 126th King of Tara / Ireland (Ui Niall).

O Cluvane - Irish / Ua Clumhain. A Sept / Family branch, who had their territory in Co. Kerry  in the south - west of Desmond / Des Mhumhain / Southern Munster where it was also changed to Clifford.

O Cluvane - Irish / Ua Clumhain. An Ecclesiastical Sept / Family branch, who had their territory in Co. Sligo in the north - west of the Connacht Province.

Clyde -

Clynch -

Coakley. See - Mac Kehilly and Colclough.

Mac Coan - Irish / Mheic Comhdhain. A Sept / Family branch, who had their territory in Co. Armagh in the south - east of the Ulster Province. Mac Cowan now used instead.

Coates. (Residence at the cottage - sheep cote) Locative origins. They were in Co. Tyrone in Central Ulster after the Confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill territories there, and the non - Catholic Plantations in 1609 AD. Later they were in Co. Antrim in the north - east of the Ulster Province, and Co. Dublin in the north - east of Southern Leinster.

Cobbe or Cobb. From Jacob. They were in Co. Dublin and Southern Leinster generally in the early 17th Century AD, especially Co. Laois, Co. Offaly and Co. Kildare. Others have been in Co. Limerick in the mid - north - west of Thomond / Northern Munster since 1659 AD.

Coburn. May be the Irish / Mheic Conboirne / Burns, which see. They were in Co. Louth in the north - east of Northern Leinster and other parts of the Heremonian Ui Cobhthaigh UI Felim Dal Cuinn 3 Colla kingdom of Orghialla / Oriel in Southern Ulster. Ancestors - *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

Cochrane. A Scottish toponymic. They were in the Ulster Province. Also used as a variant for Cuggeran and Corcoran, which see.

Codd / Coda. English origins. They were in Co. Wexford in the south - east of Southern Leinster in the 13th Century AD. Used also as a variant for Cody, which see.

Cody or Mac Coady or Archdeacon. Gaelic patronymic / Mheic Oda assumed by the Archdeacon family, which see, who were initially descended from the Anglo - Norman Baron, Odo L'Ercedekne who have been in Co. Kilkenny in the south - west of Southern Leinster since the 13th Century AD.

Coen. Used as a synonym for Coyne, which see, in the Connacht Province, and Cowan, which see, in Co. Down in the south - east of the Ulster Province. Cohen is also used and has no Jewish connection in Ireland.

O Coey - Irish / Ua Cobhthaigh. A Sept / Family branch, who had their territory in the north of the Ulster Province. Distinct from Coffey and Mac Cooey.

O Coffey or O Coffe - Irish / Ua Cobhthaigh / Cobhthach / victorious. An Ithian Corca Laoidhe Sept / Family branch, who had their territory in the west of Co. Cork in Desmond / Des Mhumhain / Southern Munster, who are kinsmen to the O Driscolls. Ancestors: *36.Lewy / Lughaidh, *35.Ith (Ithians).

O Coffey or O Coffe - Irish / Ua Cobhthaigh. A Heremonian Ui Cobhthaigh UI Felim Dal Cuinn Ui Maine Sept / Family branch, who had their territory in Co. Galway and nearby in Co. Roscommon in the south - east of the Connacht Province who were kinsmen to the O Maddens. Ancestors: *86.Maine "Mor," (Ui Maine), *85.Murray / Muiredach "Tireach" the 122nd King of Tara / Ireland, *80. Conn of the Hundred Battles the 110th King of Tara / Ireland (Dal Cuinn).

O Coffey or O Coffe - Irish / Ua Cobhthaigh. A Sept / Family branch, who had their territory in Mide / Co. Westmeath and Co. Meath in Northern Leinster where they were Chiefs.

                                                                                  +On to Mac Cogan - Coleman