| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Clovis | KLO-vis (English), klo-VEES (French) | Ancient Germanic (Latinized), French | ||
| Cnaeus | - | Ancient Roman | ||
| Cola | - | Anglo-Saxon | ||
| Colobert | - | Ancient Germanic | ||
| Colomba | - | Italian | ||
| Colombano | - | Italian | ||
| Colombina | - | Italian | ||
| Colombo | - | Italian | ||
| Columba | ko-LOOM-ba (Late Roman), kə-LUM-bə (English) | Late Roman | ||
| Columbanus | - | Late Roman | ||
| ConcepciÓN | kawn-thep-THYON (Spanish), kawn-sep-SYON (Latin American Spanish) | Spanish | ||
| Concetta | kon-CHET-tah | Italian | ||
| Concettina | kon-chet-TEE-nah | Italian | ||
| Concetto | kon-CHET-to | Italian | ||
| Concha | KON-chah | Spanish |