| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Brutus | - | Ancient Roman | ||
| Caecilia | - | German, Ancient Roman | ||
| Caecilius | - | Ancient Roman | ||
| Caelia | - | Ancient Roman | ||
| Caelina | - | Ancient Roman | ||
| Caelinus | - | Ancient Roman | ||
| Caelius | - | Ancient Roman | ||
| Caesar | SEE-zər (English) | Ancient Roman | ||
| Caius | - | Ancient Roman | ||
| Calvus | - | Ancient Roman | ||
| Camilla | kə-MIL-ə (English), kah-MEEL-lah (Italian, Danish), KAH-meel-lah (Finnish) | English, Italian, Danish, Swedish, Norwegian, Finnish, German, Ancient Roman, Roman Mythology | ||
| Camillus | kə-MIL-əs (English) | Ancient Roman | ||
| Cassia | KA-shə (English) | Ancient Roman | ||
| Cassian | KASH-ən (English) | Ancient Roman (Anglicized) | ||
| Cassianus | - | Ancient Roman |