| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Constantinus | - | Late Roman | ||
| Constantius | - | Late Roman | ||
| Consus | - | Roman Mythology | ||
| Corbinianus | - | Late Roman | ||
| Corina | - | English, German, Romanian | ||
| Cornel | - | Romanian | ||
| Cornelia | kawr-NE-lee-ah (German), kor-NE-lyah (Italian), kawr-NAY-lee-ah (Dutch), kər-NEE-lee-ə (English), kər-NEEL-yə (English) | German, Romanian, Italian, Dutch, English, Ancient Roman | ||
| Corneliu | - | Romanian | ||
| Cornelius | kər-NEE-lee-əs (English), kawr-NAY-lee-us (Dutch), kawr-NE-lee-uws (German) | Ancient Roman, English, Dutch, German, Biblical | ||
| Corona | - | Late Roman, Italian, Spanish | ||
| Cosmin | - | Romanian | ||
| Cosmina | - | Romanian | ||
| Costache | kos-TAH-ke | Romanian | ||
| Costel | ko-STEL | Romanian | ||
| CosticĂ | kos-TEE-kə | Romanian |