| Clotho | | - | Greek Mythology (Latinized) | |
| Clytemnestra | | klie-təm-NES-trə (English) | Greek Mythology (Latinized) | |
| Clytia | | - | Greek Mythology (Latinized) | |
| Coeus | | - | Greek Mythology (Latinized) | |
| Cora | | KAWR-ə (English) | English, German, Greek Mythology (Latinized) | |
| Corinna | | kə-REEN-ə (English), kə-RIN-ə (English), ko-RI-nah (German) | English, German, Ancient Greek (Latinized) | |
| Cosmas | | - | Ancient Greek (Latinized) | |
| Crius | | - | Greek Mythology (Latinized) | |
| Cronus | | KRO-nəs (English) | Greek Mythology (Latinized) | |
| Cynthia | | SIN-thee-ə (English) | English, Greek Mythology (Latinized) | |
| Cyrillus | | - | Ancient Greek (Latinized) | |
| Cyrus | | SIE-rəs (English) | English, Biblical, Biblical Latin, Ancient Greek (Latinized) | |
| Daedalus | | DED-ə-ləs (English) | Greek Mythology (Latinized) | |
| Daidalos | | - | Greek Mythology | |
| Damaris | | DAM-ə-ris (English) | Biblical, Biblical Greek | |