| Caellum | Unknown | Male |
| Caesar | Long Hair | Male |
| Caflice | Brave | Male |
| Caileigh | | Female |
| Cale | Bold | Male |
| Caleb | Bold | Male |
| Caley | Slender | Male |
| Calhoun | From The Narrow Forest | Male |
| Carmen | Song. Variant Of Carmel - Fruitful Orchard As Mount Carmel In Palestine. | Female |
| Casee | Vigilant. | Female |
| Casey | Brave: Vigilant. | Female |
| Cathasach | Brave | Female |
| Cayleigh | Pure Meadow: Party: Slender: | Female |
| Chadwick | From The Warrior's Town | Male |
| Charlotta | Feminine Of Charles Meaning Manly | Female |
| Charlotte | Tiny And Feminine. Also Feminine Of Charles Meaning Manly | Female |
| Cheveyo | Spirit Warrior (Hopi) | Male |
| Clancy | Ruddy Warrior | Male |
| Clark | Cleric: Secretary. | Male |
| Cohen | Allternate Spellings: Coen Or Koen.Brave. | Male |
| Conn | Myth Name (Son Of Lir) | Male |
| Connacht | Brave Or Wise | Male |
| Connie | Strong Willed Or Wise | Male |
| Connolly | Brave Or Wise | Male |
| Conny | Strong Willed Or Wise | Male |