| CLIVE | | KLIEV | English | |
| CLOÉ | | klo-E (French) | Portuguese, French | |
| CLODAGH | | - | Irish | |
| CLODOVICUS | | - | Ancient Germanic (Latinized) | |
| CLOE | | - | Spanish, Italian | |
| CLOELIA | | - | Ancient Roman | |
| CLOELIUS | | - | Ancient Roman | |
| CLOPAS | | KLO-pəs (English) | Biblical | |
| CLOTHILDE | | klo-TEELD | French | |
| CLOTHILDIS | | - | Ancient Germanic (Latinized) | |
| CLOTHO | | - | Greek Mythology (Latinized) | |
| CLOTILDA | | klə-TIL-də | English | |
| CLOTILDE | | klo-TEELD (French) | French, Italian, Portuguese, Spanish | |
| CLOVER | | KLO-vər | English (Rare) | |
| CLOVIS | | KLO-vis (English), klo-VEES (French) | Ancient Germanic (Latinized), French | |