| 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 |
| Cruz | Man | Spanish Names |
| Cruzita | Woman | Spanish Names |
| Cruzito | Man | Spanish Names |
| Cuba | Man | Spanish Names |
| Cuevas | Unisex | Spanish Names |
| Custodia | Woman | Spanish Names |
| Daleyza | Woman | Spanish Names |
| Dalmacio | Man | Spanish Names |
| Dama | Woman | Spanish Names |