| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Clothilde | klo-TEELD | French | ||
| Clothildis | - | Ancient Germanic (Latinized) | ||
| Clotilde | klo-TEELD (French) | French, Italian, Portuguese, Spanish | ||
| Clovis | KLO-vis (English), klo-VEES (French) | Ancient Germanic (Latinized), French | ||
| Cnaeus | - | Ancient Roman | ||
| Coba | - | Dutch | ||
| Cobus | KO-bus | Dutch | ||
| Coen | KOON | Dutch | ||
| Coenraad | KOON-rah:t | Dutch | ||
| Coinneach | - | Scottish | ||
| Cokkie | - | Dutch | ||
| Colette | ko-LET | French | ||
| Colin (1) | KAHL-in (Scottish, Irish, English), KOL-in (English) | Scottish, Irish, English | ||
| Coline | - | French | ||
| Colobert | - | Ancient Germanic |