| Carlos | Man | Spanish Names |
| Carlota | Woman | Spanish Names |
| Carmelita | Woman | Spanish Names |
| Carmelo | Man | Spanish Names |
| Carminda | Woman | Spanish Names |
| Cascada | Woman | Spanish Names |
| Cashi | Man | Spanish Names |
| Casilda | Woman | Spanish Names |
| Casta | Man | Spanish Names |
| 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 |