| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Colombo | - | Italian | ||
| Columba | ko-LOOM-ba (Late Roman), kə-LUM-bə (English) | Late Roman | ||
| Columbanus | - | Late Roman | ||
| Columbine | KAHL-əm-bien | English (Rare) | ||
| Comfort | KUM-fərt | English (Rare) | ||
| 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 | ||
| Conchita | kon-CHEE-tah | Spanish | ||
| Concordia | kən-KAWR-dee-ə (English) | Roman Mythology | ||
| Condoleezza | kahn-də-LEE-zə | Various | ||
| Connell | KAHN-əl | English (Rare) | ||
| Conrad | KAHN-rad (English), KAWN-raht (German) | English, German, Ancient Germanic |