| Bruna | | - | Italian, Portuguese, Croatian | |
| Brunella | | - | Italian | |
| Brunilda | | broo-NEEL-dah (Spanish) | Spanish, Italian, Portuguese | |
| Bruno | | BROO-no (German), BRUW-naw (Polish) | German, Italian, Spanish, Portuguese, French, Croatian, Polish, Ancient Germanic | |
| Callisto (1) | | kahl-LEE-sto | Italian | |
| Calogera | | kah-lo-JE-rah | Italian | |
| Calogero | | kah-lo-JE-ro | Italian | |
| 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 | |
| Camillo | | - | Italian | |
| Carla | | KAHR-lah (Spanish, German, Dutch), KAHR-lə (English) | Italian, Portuguese, Spanish, Catalan, English, German, Dutch | |
| Carlo | | KAHR-lo | Italian | |
| Carlotta | | kahr-LOT-tah | Italian | |
| Carmela | | kahr-ME-lah | Italian, Spanish | |
| Carmelo | | kahr-ME-lo | Spanish, Italian | |
| Carmen | | KAHR-men (Spanish), KAHR-mən (English) | Spanish, English, Italian, Romanian | |