| Cilla | | SIL-lah (Swedish), SI-lah (Dutch) | Swedish, Dutch | |
| CinÁEd | | KIN-ahj (Irish) | Scottish, Irish | |
| Citlali | | - | Native American, Nahuatl | |
| ClÉMence | | kle-MAWNS | French | |
| ClÉMent | | kle-MAWN | French | |
| Clair | | KLER | French, English | |
| Claire | | KLER | French, English | |
| Clara | | KLAH-rah (Italian, German, Spanish), KLER-ə (English), KLAR-ə (English) | Italian, German, Spanish, Portuguese, Catalan, Romanian, English, Swedish, Danish, Late Roman | |
| Clarisse | | kla-REES | French | |
| Claude | | KLOD (French), KLAWD (English) | French, English | |
| Claudette | | klo-DET | French | |
| Claudia | | KLAW-dee-ə (English), KLOW-dee-ah (German, Dutch), KLOW-dyah (Italian, Spanish, Romanian) | English, German, Dutch, Italian, Spanish, Romanian, Biblical, Ancient Roman | |
| Claudie | | klo-DEE | French | |
| Claudine | | klo-DEEN | French | |
| Claudius | | KLAW-dee-əs (English) | Ancient Roman | |