| Name | Gender | Meaning | Favorites |
| Colton | Boy | Coal town | |
| Connie | Girl | Derived from constance | |
| Cora | Girl | Maiden | |
| Coral | Girl | Small Stone | |
| Corby | Girl | Dark a saraven | |
| Cordelia | Girl | Daughter of the sea | |
| Cordell | Boy | Rope maker | |
| Corliss | Girl | Derived from carlor carlisle | |
| Cort | Boy | Bold or short | |
| Courtney | Girl | Royal Attendent | |
| Coy | Boy | Woods | |
| Coye | Girl | Woods | |
| Craig | Boy | From the crag, Rocky Hill | |
| Creda | Girl | Faith | |
| Crescent | Girl | To grow | |
| Cwen | Girl | Queen | |
| Cynthia | Girl | Moon goddess | |
| Cyril | Boy | Lord-like | |
| Dallon | Boy | A valley, From dale | |
| Dalton | Boy | The town near the valley | |
