| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 681 | Cressida | Greek | Origin origin. Cresside was the faithless mistress of Troilus in Shakespeare's 'Troilus and Cressida'. | F | |
| 682 | Cretien | Greek | Christian. | M | |
| 683 | Creusa | Greek | Daughter of Erechtheus. | F | |
| 684 | Cristoforo | Greek | Christ bearer. | M | |
| 685 | Cristophe | Greek | Christ bearer. | M | |
| 686 | Cronus | Greek | A Titan. | M | |
| 687 | Crysta | Greek | Anointed one; a Christian. | F | |
| 688 | Crystal | Greek | Feminine form of Christopher: From the Greek word meaning 'carrier of Christ', Famous bearer: St Christopher, patron Saint of travellers, is believed to have carried the Christ-child across a river. | F | |
| 689 | Ctesippus | Greek | One of Penelope's suitors. | M | |
| 690 | Cy | Greek | Diminutive of Cyril: Lord, lordly. Famous bearer, the 9th-century missionary Saint Cyril, devised the Cyrillic alphabet used in Slavonic languages. | M | |
| 691 | Cybele | Greek | Mythological nature goddess worshiped as the Great Mother in Asia Minor. The mother of all gods and men and wild nature. Often kept company by lions. Identified with Rhea by the Greeks; with Maia and Ceres by the Romans. | F | |
| 692 | Cycnus | Greek | Swan. | M | |
| 693 | Cyma | Greek | Flourish. | F | |
| 694 | Cynthia | Greek | Of Cynthus (Mount Cynthus on the island of Delos). Famous bearer: Cynthia was one of the names of the mythological moon goddess Artemis, referring to her birth on Mount Cynthus. | F | |
| 695 | Cyprian | Greek | From Cyprus. | M | |
| 696 | Cypris | Greek | From Cyprus. | F | |
| 697 | Cyr | Greek | Lordly. | M | |
| 698 | Cyrano | Greek | From Cyrene (Greek island). | M | |
| 699 | Cyrek | Greek | Lordly. | M | |
| 700 | Cyrena | Greek | Mother of Aristaeus. | F | |