| Castañeda | Unisex | Spanish Names |
| Castel | Unisex | Spanish Names |
| Castillo | Unisex | Spanish Names |
| Castrello | Man | Spanish Names |
| Castro | Unisex | Spanish Names |
| Catalin | Woman | Spanish Names |
| Catalina | Woman | Spanish Names |
| Cayman | Man | Spanish Names |
| Celerina | Woman | Spanish Names |
| Cenobia | Woman | Spanish Names |
| Cervantes | Unisex | Spanish Names |
| Cesar | Man | Spanish Names |
| Chabela | Woman | Spanish Names |
| Chago | Man | Spanish Names |
| Chalina | Woman | Spanish Names |
| Charo | Woman | Spanish Names |
| Chavez | Man | Spanish Names |
| Che | Man | Spanish Names |
| Cheche | Unisex | Spanish Names |
| Chepe | Man | Spanish Names |