| Cascadia | Woman | Latin Names |
| Cassian | Man | Latin Names |
| Cassius | Man | Latin Names |
| Castellana | Woman | Latin Names |
| Castiel | Unisex | Latin Names |
| Cato | Unisex | Latin Names |
| Cece | Woman | Latin Names |
| Cecelia | Woman | Latin Names |
| Cecilia | Woman | Latin Names |
| Celeste | Woman | Latin Names |
| Celestine | Unisex | Latin Names |
| Celia | Woman | Latin Names |
| Celina | Woman | Latin Names |
| Celsa | Woman | Latin Names |
| Ceteria | Woman | Latin Names |
| Chalice | Unisex | Latin Names |
| Chevron | Unisex | Latin Names |
| Cicero | Man | Latin Names |
| Cilicia | Woman | Latin Names |
| Circa | Unisex | Latin Names |