| Clifton | Man | English Names |
| Cline | Unisex | German Names |
| Clint | Man | English Names |
| Clinton | Man | English Names |
| Clio | Woman | Greek Names |
| Cliona | Woman | Irish Names |
| Clive | Man | English Names |
| Clodagh | Woman | Irish Names |
| Clodia | Woman | Latin Names |
| Clorinda | Woman | English Names |
| Cloris | Woman | Greek Names |
| Clothilde | Woman | French Names |
| Clotilda | Woman | German Names |
| Cloud | Unisex | American Names |
| Clove | Unisex | German Names |
| Clover | Woman | English Names |
| Clovia | Woman | American Names |
| Clovis | Man | French Names |
| Clyde | Man | Scottish Names |
| Coaxoch | Woman | Aztec Names |