| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Clyde | [klaid] | |||
| CLYDE | KLIED | English | ||
| CLYTEMNESTRA | klie-təm-NES-trə (English) | Greek Mythology (Latinized) | ||
| CLYTIA | - | Greek Mythology (Latinized) | ||
| CNAEUS | - | Ancient Roman | ||
| CNUT | KNOOT (English), KNYOOT (English) | History | ||
| COŞKUN | - | Turkish | ||
| Coates | [kəuts] | |||
| Coats | [kəuts] | |||
| COBA | - | Dutch | ||
| Cobb | [kɔb] | |||
| COBUS | KO-bus | Dutch | ||
| COBY | KO-bee | English | ||
| Cochran | ['kɔkən] | |||
| COCO | KO-ko | Various |