| Callias | | - | Ancient Greek (Latinized) | |
| Carlman | | - | Ancient Germanic | |
| Carloman | | - | History, Ancient Germanic | |
| Carolus | | - | Ancient Germanic (Latinized) | |
| Cassander | | - | Ancient Greek (Latinized) | |
| Chares | | - | Ancient Greek | |
| Chariovalda | | - | Ancient Germanic | |
| Charis | | KAR-is (English) | Ancient Greek, English (Rare) | |
| Chariton | | - | Ancient Greek | |
| Charmion | | - | Ancient Greek | |
| Chlodochar | | - | Ancient Germanic | |
| Chlodovech | | - | Ancient Germanic | |
| Chlodulf | | - | Ancient Germanic | |
| Chloe | | KLO-ee (English) | English, Biblical, Biblical Latin, Biblical Greek, Ancient Greek, Greek Mythology | |
| Chlothar | | - | Ancient Germanic | |