| CRISTIANO | | kree-STYAH-no (Italian), kreesh-TYA-noo (Portuguese) | Italian, Portuguese | |
| CRISTINA | | kree-STEE-nah (Italian, Spanish) | Italian, Spanish, Portuguese, Romanian | |
| CRISTOFORO | | - | Italian | |
| CRIUS | | - | Greek Mythology (Latinized) | |
| CROCETTA | | kro-CHET-tah | Italian | |
| CROCIFISSA | | kro-chee-FEE-sah | Italian | |
| Crocker | | ['krɔkə] | | |
| CROFTON | | KRAWF-tən | English (Rare) | |
| CRONUS | | KRO-nəs (English) | Greek Mythology (Latinized) | |
| Crosby | | ['krɔ:zbi] | | |
| Crowley | | ['krəuli:] | | |
| CRUZ | | KROOTH (Spanish), KROOS (Latin American Spanish), KROOSH (Portuguese) | Spanish, Portuguese | |
| CRUZITA | | kroo-THEE-tah (Spanish), kroo-SEE-tah (Latin American Spanish) | Spanish | |
| CRYSTAL | | KRIS-təl | English | |
| CRYSTIN | | - | Welsh | |