| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Caedmon | KAD-mən (English) | History | ||
| Cajetan | - | History | ||
| Caligula | kə-LIG-yoo-lə (English) | History | ||
| Cambyses | - | History | ||
| Canute | kə-NOOT (English), kə-NYOOT (English) | History | ||
| Carloman | - | History, Ancient Germanic | ||
| Charlemagne | SHAHR-lə-mayn (English) | History | ||
| Cnut | KNOOT (English), KNYOOT (English) | History | ||
| Confucius | kən-FYOO-shəs (English) | History | ||
| Constantine | KAHN-stən-teen (English) | History | ||
| Cyprian | SIP-ree-ən (English) | History | ||
| Cyra | - | History |