| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 241 | Caesare | Greek | Long haired. | M | |
| 242 | Calais | Greek | Son of Boreas. | M | |
| 243 | Calchas | Greek | A seer. | M | |
| 244 | Capaneus | Greek | One of the attackers against Thebes. | M | |
| 245 | Caseareo | Greek | Long haired. | M | |
| 246 | Cassiel | Greek | The guardian of Capricornians. | M | |
| 247 | Castor | Greek | Beaver. Brother of Helen. | M | |
| 248 | Cecrops | Greek | Founder of Athens. | M | |
| 249 | Celeus | Greek | Father of Triptolemus. | M | |
| 250 | Cenon | Greek | Friendly. | M | |
| 251 | Cephalus | Greek | Husband who killed Procris. | M | |
| 252 | Cepheus | Greek | The father of Andromeda in ancient Greek mythology. | M | |
| 253 | CerbeIus | Greek | Guardian to the gate of Hades. | M | |
| 254 | Cercyon | Greek | Name of a king. | M | |
| 255 | Cesare | Greek | Long haired. | M | |
| 256 | Cetus | Greek | Sea monster of Poseidon. | M | |
| 257 | Ceyx | Greek | Husband of Alcyone. | M | |
| 258 | Charon | Greek | Ferryman across the river Styx. | M | |
| 259 | Charybdis | Greek | A deadly whirlpool. | M | |
| 260 | Chimera | Greek | The monster killed by Bellerophon. | M | |