| Carolina | | kah-ro-LEE-nah (Italian, Spanish), ka-roo-LEE-nə (Portuguese), ker-ə-LIEN-ə (English), kar-ə-LIEN-ə (English) | Italian, Spanish, Portuguese, English, Swedish | |
| Caroline | | ka-ro-LEEN (French), KER-ə-lien (English), KER-ə-lin (English), KAR-ə-lien (English), KAR-ə-lin (English) | French, English, German, Swedish, Norwegian, Danish, Dutch | |
| Carolus | | - | Ancient Germanic (Latinized) | |
| Carpus | | KAHR-pəs (English) | Biblical, Biblical Latin | |
| Carran | | - | English (Rare) | |
| Carreen | | kə-REEN | English (Rare) | |
| Carsten | | KAHR-sten (Low German) | Low German, Danish | |
| Carver | | KAHR-vər | English (Rare) | |
| Casimiro | | - | Spanish, Portuguese, Italian | |
| Caspar | | - | Judeo-Christian Legend | |
| Casper | | KAHS-pər (Dutch) | Dutch, Swedish, Norwegian, Danish | |
| Caspian | | KAS-pee-ən (English) | Literature | |
| Cassander | | - | Ancient Greek (Latinized) | |
| Cassandra | | kə-SAN-drə (English), kə-SAHN-drə (English), kahs-SAHN-drah (Italian) | English, Spanish, Portuguese, Italian, French, German, Greek Mythology (Latinized) | |
| Cassarah | | kə-SER-ə, KAS-ə-rə | English (Rare) | |