| Claudia | | KLAW-dee-ə (English), KLOW-dee-ah (German, Dutch), KLOW-dyah (Italian, Spanish, Romanian) | English, German, Dutch, Italian, Spanish, Romanian, Biblical, Ancient Roman | |
| Claudiu | | - | Romanian | |
| ConstanȚA | | - | Romanian | |
| Constantin | | kon-stahn-TEEN (Romanian), kawn-stawn-TEN (French) | Romanian, French | |
| 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 | |
| Cosmin | | - | Romanian | |
| Cosmina | | - | Romanian | |
| Costache | | kos-TAH-ke | Romanian | |
| Costel | | ko-STEL | Romanian | |
| CosticĂ | | kos-TEE-kə | Romanian | |
| Costin | | - | Romanian | |
| Crina | | KREE-nah | Romanian | |