| Ciqala | Unisex | Native American - Dakota Names |
| Cira | Woman | Italian Names |
| Circa | Unisex | Latin Names |
| Circe | Woman | Greek Names |
| Círdan | Man | English - Literature Names |
| Cirila | Woman | Greek Names |
| Ciro | Man | Italian Names |
| Cirocco | Man | Italian Names |
| Cisco | Man | Spanish Names |
| Cisneros | Unisex | Spanish Names |
| Cissy | Woman | English Names |
| Citlali | Woman | Native American - Aztec Names |
| Citlalli | Woman | Aztec Names |
| Citra | Unisex | Indonesian Names |
| Citro | Man | Indonesian Names |
| Civilla | Woman | American Names |
| Claire | Woman | French Names |
| Clancy | Man | Irish Names |
| Clapton | Unisex | English Names |
| Clara | Woman | Latin Names |