| Carthina | - | Phoenician Name | Carthon | - | Phoenician Name |
| Carthona | - | Phoenician Name | Carthubaal | - | Phoenician Name |
| Cartier | - | Australian Name | Cartimandua | - | Anglo Name |
| Carver | - | English Name | Cary | - | Welsh Name |
| Caryn | - | American Name | Carys | - | Welsh Name |
| Casandra | - | Greek Name | Case | - | English Name |
| Casen | - | Scandinavian Name | Casey | - | Maori Name |
| Cash | - | English Name | Cashel | - | Irish Name |
| Cashlin | - | Irish Name | Cashlyn | - | American Name |
| Cashton | - | English Name | Casie | - | American Name |
| Casimir | - | Swiss Name | Casimira | - | Slavic Name |
| Casiphia | - | Biblical Name | Casluhim | - | Biblical Name |
| Casmara | - | Maori Name | Cason | - | Scottish Name |
| Caspar | - | Persian Name | Casper | - | Icelandic Name |
| Caspian | - | United States Name | Caspian | - | English Name |
| Cassadee | - | Irish Name | Cassady | - | Irish Name |
| Cassandra | - | English Name | Cassara | - | American Name |
| Cassi | - | American Name | Cassia | - | Muslim Name |
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