| Ciprian | | cheep-RYAHN | Romanian | |
| Cipriano | | chee-pree-AH-no (Italian) | Italian, Spanish, Portuguese | |
| CirÍAco | | - | Portuguese, Spanish | |
| Ciriaco | | chee-ree-AH-ko (Italian), thee-ree-AH-ko (Spanish), see-ree-AH-ko (Latin American Spanish) | Italian, Spanish | |
| Cirillo | | chee-REEL-lo | Italian | |
| Cirino | | chee-REE-no (Italian), thee-REE-no (Spanish), see-REE-no (Latin American Spanish) | Italian, Spanish | |
| Ciro | | CHEE-ro (Italian), THEE-ro (Spanish), SEE-ro (Latin American Spanish) | Italian, Spanish | |
| Citlali | | - | Native American, Nahuatl | |
| Citra | | CHEET-rah | Indonesian | |
| ClÍMaco | | - | Spanish | |
| Clara | | KLAH-rah (Italian, German, Spanish), KLER-ə (English), KLAR-ə (English) | Italian, German, Spanish, Portuguese, Catalan, Romanian, English, Swedish, Danish, Late Roman | |
| Claretta | | - | Italian | |
| Clarisa | | klah-REE-sah | Spanish | |
| Clarissa | | klə-RIS-ə (English) | English, Italian, Portuguese, Spanish | |
| Claritia | | - | Late Roman | |