Chesney or Cheyney. French origins - chesnai / oakgrove. Some  in Ireland during Mediaeval Times, but most came during the Confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh UI Felim Dal Cuinn "Northern" Ui Niaill territories in the Ulster Province, and the Foreign non - Catholic Plantations there in the 17th Century AD.

Chevers or Cheveers. They were in Co. Carlow in Southern Leinster and Co. Meath in the south - east of Northern Leinster.

Mac Cheyne. Used as a variant for Mac Shane, which see, in Co. Down in the south - east of the Ulster Province.

Chichester. A toponymic origin. They have been in the Ulster Province since the early 17th Century AD after the the Confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh UI Felim Dal Cuinn "Northern" Ui Niaill territories in the Ulster Province, and the Foreign non - Catholic Plantations there in the 17th Century AD.

Chisholm. Scottish origins. They were in the Ulster Province where it is sometimes also written as Chism.

Chiver -

Christianston. They were in Co. Louth in the north - east of Northern Leinster. See also Christian.

Christopher - Irish / Criostoir. They have been in Co. Waterford in the south - east of Ormond / Eastern Munster since the 13th Century AD in the Barony of Decies.

Christy. Scottish origins. They were in the Ulster Province.

Mac Christy - Irish / Mheic Criosta.

Chrystal. See - Crystal.

Church. English origins. (atte churche.) They have been in the Ulster Province since the 17th Century AD after the Confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh Ui Felim Dal Cuinn "Northern" Ui Niaill territories in the Ulster Province, and the Foreign non - Catholic Plantations there.

Church. eaglais / church. Aglish used in the Munster Province.

O Ciassart - Irish / Ua Ciassart. A Sept / Family branch, who had their territory in the Ulster Province around 1302 AD and because of the continual inability of the English to penetrate there, they continued to hold sway around Co. Derry in the north - east of Ulster.

O Cionaoith - Irish / Ua Chionaoith.

O Clabby - Irish / Ua Clabaigh - clabach / wide mouth. They were an Erenagh Sept / Family branch, at St. Patricks Oran and had their territory in Co. Roscommon in the east of the Connacht Province.

Mac Claffey - Irish / Mheic Laithimh - flaitheamh / lord. They were originally in Northern Leinster. Some anglicized later also as Mac Clave, which see. a Sept / Family branch, who had their territory in the Ulster Province. See also Hand.

O Clahane or O Clehane - Irish / Ua Cathalain. A Sept / Family branch, who had their territory in the west of Co. Limerick in the north - west of Thomond / Tuaiscert Mhumhain / Northern Munster. O Cahalane is also used as a variant.

O Claisin. A Sept / Family branch, who had their territory in Co. Cork in Desmond / Des Mhumhain / Southern Munster.

Mac Clancy - Irish / Mheic Fhlannchaidh - flann chadh / red warrior. They were a Heberian Dal gCais Ui Caisin Sept / Family branch, who had their territory in Co. Clare in the north - west of Thomond / Tuaiscert Mhumhain / Northern Munster in the Barony of Tulla, who were a Sept of the *Mac Namaras. They are directly descended from *Clancy / Flannchadh Mheic Con na Mara and they acted as Dalcassian Brehon Lawyers to the O Brians / Ui mBriain Sept. Similar to the other Gaelic Families they survived until the 17th Century AD under the constant English ethnic and religious oppression. Ancestors: *92.Caisin (Ui Caisin), *91,Cass the King of Thomond. (Dal gCais.)

Mac Clancy. Brehon Lawyers in Co. Kerry in south - west of Desmond / Des Mhumhan / Southern Munster Province, and were also Chiefs there in Co. Cork in Southern Munster.

Mac Clancy - Irish / Mheic Fhannchaidh. A Sept / Family branch, who had their territory in Co. Leitrim in Northern Connacht at Rosclogher near Loch Melvin where they were the Chiefs and Kings of Dartry.

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