| Name | Meaning | Gender | Origin |
|---|
| Claudia | Feminine of Claude.
| Female | Latin |
| Clay | adhere, mortal | Male | English |
| Cleveland | land near the hill, from the cliffs | Male | English |
| Clint | English, hilltop town | Male | English |
| Clio | praise, muse of history | Female | Greek |
| Coby | Supplanter, Representative | Male | English |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Coco | A pet name.
| Female | Spanish |
| Cohen | priest | Male | Hebrew |
| Cole | coal, victory of the people | Male | English |
| Colin | Strong and virile; victorious army; youth, child, victor | Male | English |
| Colt | From The Dark Town | Male | English |
| Connie | Constant, Firm | Male | English |
| Connor | lover of hounds | Male | Irish |
| Cooper | Barrel maker | Male | English |
| Corey | raven, from the hollow | Male | Irish |
| Corinne | maiden | Female | |
| Cornelius | horn | Male | Latin |
| Costello | | Unisex | Hebrew |
| Cris | Anointed, Follower Of Christ | Unisex | English |
| Crosby | dweller near the town crossing | Male | Irish |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Crystal | Variant of Christiana. Follower of Christ.
| Female | |
| Cunningham | From Cunningham | Unisex | Scottish |