| Name | Gender | Meaning | Favorites |
| Cael | Boy | Victorious people | |
| Caelan | Girl | Victorious people | |
| Cairbre | Boy | Strong man | |
| Caitir | Girl | Pure | |
| Caitlin | Girl | The Celtic form of Catherine | |
| Caitlyn | Girl | Pure | |
| Calhoun | Boy | Warrior | |
| Callum | Boy | Dove | |
| Cargan | Boy | Little rock | |
| Carney | Boy | Victorious | |
| Casey | Boy | Brave | |
| Cashlin | Boy | Vain | |
| Catriona | Girl | Pure | |
| Ceana | Girl | God is gracious | |
| Chaela | Girl | Like god | |
| Chaeli | Girl | Like god | |
| Ciara | Girl | Black, Mysterious | |
| Cole | Boy | Derives from nicholas | |
| Colleen | Girl | Irish girl | |
| Colm | Boy | Dove | |
