| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| CÉIBHFHIONN | - | Irish Mythology | ||
| CÉLESTE | se-LEST | French | ||
| CÉLESTIN | se-les-TEN | French | ||
| CÉLESTINE | - | French | ||
| CÉLIA | SE-lyə | Portuguese | ||
| CÉLINE | se-LEEN | French | ||
| CÉSAIRE | - | French | ||
| CÉSAR | THE-sahr (Spanish), SE-sahr (Latin American Spanish) | French, Spanish, Portuguese | ||
| CÉZAR | - | Portuguese (Brazilian) | ||
| CÍNTIA | - | Portuguese | ||
| CÓEMGEIN | KEE-veen, KWEE-vin | Irish | ||
| CÔME | - | French | ||
| CÔNG | - | Vietnamese | ||
| CÚC | - | Vietnamese | ||
| CÚCHULAINN | - | Irish Mythology |