| Cathal | Irish | Old name believed to be derived fro.. |  |  |
| Cathaoir | Irish | Old name derived from the Old Irish.. | | |
| Catherine | Irish | A borrowing from the English, Cathe.. |  | |
| Cathleen | Irish | Anglicized form of the Irish Caitli.. | | |
| Cavan | Irish | Meaning "handsome." See also Kevin.. | | |
| Ceallach | Irish | Old name derived from ceallach (war.. |  | |
| Ceallachan | Irish | Diminutive form of ceallach (strife.. | | |
| Cearbhall | Irish | Gaelic name meaning "champion, warr.. | | |
| Cecil | Irish | A borrowing from the English, Cecil.. | | |
| Cecilia | Irish | Brought to Ireland by the Anglo-Nor.. | | |
| Cedric | Irish | A borrowing from the English, Cedri.. |  | |
| Charles | Irish | A borrowing from the Scottish and E.. | | |
| Charlotte | Irish | Feminine diminutive form of Charles.. | | |
| Chevonne | Irish | Anglicized form of Siobhan, which i.. | | |
| Christian | Irish | From the Latin Christianus (a Chris.. | | |
| Christian | Irish | From the Latin Christianus (a Chris.. | | |
| Christina | Irish | Derived from the Latin Christiana, .. | | |
| Christopher | Irish | A 16th-century borrowing from the E.. | | |
| Cian | Irish | Old Irish name derived from cia.. | | |
| Ciana | Irish | Meaning "stormy," or "roughness," i.. | | |
| Cianan | Irish | Diminutive form of Cian (ancient, i.. | | |
| Ciannait | Irish | Feminine diminutive form of Cian (a.. | | |
| Ciara | Irish | Popular name derived from ciar (bla.. | | |
| Ciaran | Irish | Popular name which is a diminutive .. | | |
| Ciardha | Irish | Derived from ciar (black): hence, ".. | | |
| Ciarrai | Irish | Derived from ciar (black). Ciarrai .. | | |
| Cierra | Irish | Meaning "black." This name has been.. | | |
| Cillian | Irish | Pet form of Ceallach (war, strife)... | | |
| Cinneidid | Irish | Compound name composed from the Gae.. | | |
| Cinnie | Irish | Meaning "beauty."
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| Clancy | Irish | Meaning "red-headed fighter's child.. | | |
| Clare | Irish | Derived from the Latin clarus (brig.. | | |
| Cliodhna | Irish | Gaelic name of uncertain meaning | | |
| Clodagh | Irish | The name of a river in county Tippe.. | | |
| Coelfinnia | Irish | Latinate form of the Gaelic Caoilfh.. | | |
