| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Calixtus | - | Late Roman | ||
| Callistus | kə-LIS-təs (English) | Late Roman | ||
| Callixtus | - | Late Roman | ||
| Calogerus | - | Late Roman | ||
| Calvus | - | Ancient Roman | ||
| Camelia | kah-MEL-yah | Romanian | ||
| 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 | ||
| Candida | KAN-di-də (English) | Late Roman, English | ||
| Candidus | - | Late Roman | ||
| Cardea | - | Roman Mythology | ||
| Carina (1) | kə-REEN-ə (English), kah-REE-nah (German) | English, Portuguese, Spanish, German, Late Roman | ||
| Carmen | KAHR-men (Spanish), KAHR-mən (English) | Spanish, English, Italian, Romanian | ||
| Carol (2) | - | Romanian | ||
| Cassia | KA-shə (English) | Ancient Roman |