| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Cosmo | KAWZ-mo | English | ||
| Coty | - | English (Modern) | ||
| Courtney | KORT-nee | English | ||
| Coy | KOI | English | ||
| Craig | KRAYG | Scottish, English | ||
| Crawford | KRAW-fərd | English | ||
| Cree | KREE | English (Rare) | ||
| Creighton | KRAY-tən | English (Rare) | ||
| Crispian | - | English (Archaic) | ||
| Crispin | KRIS-pin | English (Rare) | ||
| Cristal | KRIS-təl | English | ||
| Cristen | KRIS-tən | English (Modern) | ||
| Crofton | KRAWF-tən | English (Rare) | ||
| Crystal | KRIS-təl | English | ||
| Cullen | KUL-ən | English |