| Caratacus | | - | Ancient Celtic (Latinized) | |
| Cardea | | - | Roman Mythology | |
| Caridad | | kah-ree-DHAHD | Spanish | |
| Carina (1) | | kə-REEN-ə (English), kah-REE-nah (German) | English, Portuguese, Spanish, German, Late Roman | |
| Carina (2) | | kah-REE-nah (German) | Swedish, Norwegian, Danish, German | |
| Carl | | KAHRL (German, English) | German, Swedish, Norwegian, Danish, English | |
| Carla | | KAHR-lah (Spanish, German, Dutch), KAHR-lə (English) | Italian, Portuguese, Spanish, Catalan, English, German, Dutch | |
| Carles | | - | Catalan | |
| Carlito | | kahr-LEE-to (Spanish) | Spanish, Portuguese | |
| Carlitos | | - | Spanish, Portuguese | |
| Carlman | | - | Ancient Germanic | |
| Carlo | | KAHR-lo | Italian | |
| Carloman | | - | History, Ancient Germanic | |
| Carlos | | KAHR-los (Spanish) | Spanish, Portuguese, Catalan | |
| Carlota | | kahr-LO-tah (Spanish) | Spanish, Portuguese | |