| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 341 | Cinthia | Greek | One of the names of the mythological moon goddess Artemis referring to her birth on Mount Cynthus. | F | |
| 342 | Cinyras | Greek | Founded the cult of Aphrodite. | F | |
| 343 | Circe | Greek | A witch. | F | |
| 344 | Clea | Greek | Abbreviation of Clotilde and Cleopatra. | F | |
| 345 | Clematis | Greek | Flower name. | F | |
| 346 | Cleo | Greek | A diminutive of Cleopatra and Clotilde, meaning famed. Famous bearer: 20th century British jazz singer Cleo Laine. | F | |
| 347 | Cleone | Greek | The mythological daughter of a river god. | F | |
| 348 | Cleopatra | Greek | Her father's fame; Glory of her father. Egyptian Queen immortalized by Shakespeare in Antony and Cleopatra'. | F | |
| 349 | Cleta | Greek | Illustrious. | F | |
| 350 | Cliantha | Greek | Glory. | F | |
| 351 | Clianthe | Greek | Glory. | F | |
| 352 | Clio | Greek | Celebrate. Abbreviation of Clotilde and Cleopatra. Clio was the Mythological Muse of historic poetry. | F | |
| 353 | Cloria | Greek | Goddess of spring. | F | |
| 354 | Cloris | Greek | Blooming. Mythological goddess of flowers or spring. | F | |
| 355 | Clotho | Greek | A Fate. | F | |
| 356 | Clymena | Greek | Mother of Atalanta. | F | |
| 357 | Clymene | Greek | Mother of Atalanta. | F | |
| 358 | Clyte | Greek | A water nymph. | F | |
| 359 | Clytemnestra | Greek | Murdered Agamemnon. | F | |
| 360 | Clytie | Greek | Mythological water nymph who loved the sun god Helios. She was changed into a sunflower and now always turns her face toward the sun. | F | |