| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Clover | KLO-vər | English (Rare) | ||
| Clovis | KLO-vis (English), klo-VEES (French) | Ancient Germanic (Latinized), French | ||
| Clytemnestra | klie-təm-NES-trə (English) | Greek Mythology (Latinized) | ||
| Clytia | - | Greek Mythology (Latinized) | ||
| Cnaeus | - | Ancient Roman | ||
| Coco | KO-ko | Various | ||
| Coeus | - | Greek Mythology (Latinized) | ||
| Col | - | Medieval English | ||
| Cola | - | Anglo-Saxon | ||
| Colene | kah-LEEN | English (Rare) | ||
| Collyn | kah-LEEN | English (Rare) | ||
| Colobert | - | Ancient Germanic | ||
| Colomba | - | Italian | ||
| Colombano | - | Italian | ||
| Colombina | - | Italian |