| Casimir | | KAZ-i-meer (English) | English, French | |
| Cassandra | | kə-SAN-drə (English), kə-SAHN-drə (English), kahs-SAHN-drah (Italian) | English, Spanish, Portuguese, Italian, French, German, Greek Mythology (Latinized) | |
| Cateline | | - | Medieval French | |
| Catherine | | ka-tə-REEN (French), ka-TREEN (French), KATH-ə-rin (English), KATH-rin (English) | French, English | |
| Cerise | | - | French | |
| Chantal | | shawn-TAHL (French), shawn-TAL (English), shan-TAL (English), shahn-TAHL (Dutch) | French, English, Dutch | |
| Charles | | CHAHR-əlz (English), CHAHRLZ (English), SHAHRL (French) | English, French | |
| Charline | | - | French | |
| Charlot | | shar-LO | French | |
| Charlotte | | shar-LOT (French), SHAHR-lət (English), shahr-LAW-tə (German), shah-LOT (Swedish), shahr-LAWT-tə (Dutch) | French, English, German, Swedish, Norwegian, Danish, Dutch | |
| ChloÉ | | klo-E | French | |
| Christelle | | krees-TEL | French | |
| Christian | | KRIS-chən (English), KRISH-chən (English), krees-TYAWN (French), KRIS-tee-ahn (German, Swedish) | English, French, German, Swedish, Norwegian, Danish | |
| Christiane | | kris-tee-AH-nə (German), krees-TYAHN (French) | German, French | |
| Christine | | krees-TEEN (French), kris-TEEN (English), kris-TEE-nə (German, Dutch) | French, English, German, Swedish, Norwegian, Danish, Dutch | |