| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Cosmina | - | Romanian | ||
| Costache | kos-TAH-ke | Romanian | ||
| Costel | ko-STEL | Romanian | ||
| CosticĂ | kos-TEE-kə | Romanian | ||
| Costin | - | Romanian | ||
| Crescens | - | Late Roman, Biblical Latin | ||
| Crescentia | - | German, Late Roman | ||
| Crescentius | - | Late Roman | ||
| Crina | KREE-nah | Romanian | ||
| Crispinus | - | Ancient Roman | ||
| Crispus | - | Ancient Roman | ||
| Cristi | - | Romanian | ||
| Cristian | - | Romanian | ||
| Cristina | kree-STEE-nah (Italian, Spanish) | Italian, Spanish, Portuguese, Romanian | ||
| Cupid | KYOO-pəd (English) | Roman Mythology |