| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Corneille | kor-NAY | French (Archaic) | ||
| Cosette | - | French, Literature | ||
| Cosme | - | Portuguese, French | ||
| CunÉGonde | - | French | ||
| Cyrielle | - | French | ||
| Cyril | SIR-əl (English), SEER-əl (English), TSI-ril (Czech) | English, French, Czech, Slovak | ||
| Cyrille | see-REEL | French | ||
| DÉBora | DE-bo-rah (Spanish) | Spanish, Portuguese, French | ||
| DÉLia | - | Portuguese, French, Hungarian | ||
| DÉOdat | - | French | ||
| DÉSirÉ | de-zee-RE | French | ||
| DÉSirÉE | de-zee-RE | French | ||
| Damien | - | French | ||
| Dan (2) | DAN (English), DAHN (Romanian, Czech, Swedish) | English, Spanish, French, Portuguese, Romanian, Czech, German, Polish, Swedish, Danish, Norwegian | ||
| DaniÈLe | - | French |