| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Cairo | KIE-ro | English (Rare) | ||
| Caiside | - | Ancient Irish | ||
| Caius | - | Ancient Roman | ||
| Caj | - | Swedish, Norwegian, Danish | ||
| Caja | - | Danish | ||
| Calanthe | kə-LAN-thee | English (Rare) | ||
| Calanthia | kə-LAN-thee-ə | English (Rare) | ||
| Caleb | KAY-ləb (English) | English, Biblical | ||
| Calfuray | kal-foo-RAW-ee | Native American, Mapuche | ||
| Calista | kə-LIS-tə (English), kah-LEE-stah (Spanish) | English, Portuguese, Spanish | ||
| Calisto | kah-LEE-sto (Spanish) | Portuguese, Spanish | ||
| Calixta | - | Spanish, Portuguese | ||
| Calixto | - | Spanish, Portuguese | ||
| Calixtus | - | Late Roman | ||
| Calleigh | KAL-ee | English (Rare) |