| Cascada | Woman | Spanish Names |
| Cascade | Woman | French Names |
| Cascadia | Woman | Latin Names |
| Cascata | Woman | American Names |
| Case | Unisex | English Names |
| Casey | Unisex | Irish Names |
| Cash | Man | English Names |
| Cashel | Man | Irish Names |
| Cashi | Man | Spanish Names |
| Cashlin | Woman | English Names |
| Cashmere | Unisex | English Names |
| Cashton | Man | American Names |
| Casilda | Woman | Spanish Names |
| Casimir | Man | Slavic Names |
| Casimira | Woman | Slavic Names |
| Casmir | Man | Polish Names |
| Cason | Man | American Names |
| Caspar | Man | German Names |
| Casper | Man | German Names |
| Caspera | Woman | Dutch Names |