| Cleme | Man | Spanish Names |
| Clemente | Man | Spanish Names |
| Colón | Unisex | Spanish Names |
| Colorado | Unisex | Spanish Names |
| Concepcion | Woman | Spanish Names |
| Conrado | Man | Spanish Names |
| Consuelo | Woman | Spanish Names |
| Contreras | Unisex | Spanish Names |
| Corazón | Woman | Spanish Names |
| Cordero | Man | Spanish Names |
| Cordova | Unisex | Spanish Names |
| Corona | Woman | Spanish Names |
| Cortéz | Man | Spanish Names |
| Costa | Unisex | Spanish Names |
| Crisanta | Woman | Spanish Names |
| Crisanto | Man | Spanish Names |
| Crispina | Woman | Spanish Names |
| Cristina | Woman | Spanish Names |
| Cristobal | Man | Spanish Names |
| Cristofer | Man | Spanish Names |