| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Crocetta | kro-CHET-tah | Italian | ||
| Crocifissa | kro-chee-FEE-sah | Italian | ||
| Cruz | KROOTH (Spanish), KROOS (Latin American Spanish), KROOSH (Portuguese) | Spanish, Portuguese | ||
| Cruzita | kroo-THEE-tah (Spanish), kroo-SEE-tah (Latin American Spanish) | Spanish | ||
| Csaba | CHAW-baw | Hungarian | ||
| Csenge | CHENG-ge | Hungarian | ||
| Csilla | CHEEL-law | Hungarian | ||
| CuauhtÉMoc | - | Native American, Nahuatl | ||
| Cuidightheach | - | Ancient Irish | ||
| Cunigund | - | Ancient Germanic | ||
| Cunobelinus | kyoo-no-bə-LIEN-əs (English) | Ancient Celtic | ||
| Cupid | KYOO-pəd (English) | Roman Mythology | ||
| Curro | - | Spanish | ||
| Custodia | - | Spanish | ||
| Custodio | - | Spanish |