| CristiÁN | | kree-STYAHN | Spanish | |
| Cristina | | kree-STEE-nah (Italian, Spanish) | Italian, Spanish, Portuguese, Romanian | |
| Cruz | | KROOTH (Spanish), KROOS (Latin American Spanish), KROOSH (Portuguese) | Spanish, Portuguese | |
| Cruzita | | kroo-THEE-tah (Spanish), kroo-SEE-tah (Latin American Spanish) | Spanish | |
| Curro | | - | Spanish | |
| Custodia | | - | Spanish | |
| Custodio | | - | Spanish | |
| DÉBora | | DE-bo-rah (Spanish) | Spanish, Portuguese, French | |
| Dalia (1) | | - | Spanish (Latin American), American (Hispanic) | |
| Dan (2) | | DAN (English), DAHN (Romanian, Czech, Swedish) | English, Spanish, French, Portuguese, Romanian, Czech, German, Polish, Swedish, Danish, Norwegian | |
| Dani (2) | | - | Hungarian, Spanish | |
| Daniel | | DAN-yəl (English), dah-nee-EL (Jewish), dan-YEL (French), DAH-nee-el (German), DAHN-yel (Polish) | English, Hebrew, French, German, Swedish, Norwegian, Danish, Polish, Czech, Slovak, Spanish, Portugu | |
| Daniela | | dahn-YE-lah (German) | Italian, German, Czech, Slovak, Romanian, Portuguese, Spanish, Bulgarian, Macedonian, English | |
| Danilo | | - | Italian, Portuguese, Spanish, Slovene, Serbian, Croatian | |
| DarÍO | | dah-REE-o | Spanish | |