| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 521 | Callisto | Greek | Mother of Arcas. | F | |
| 522 | Calynda | Greek | Lark. | F | |
| 523 | Calypso | Greek | The mythological nymph who beguiled Odysseus for seven years. A West Indies style of singing. Daughter of Atlas. | F | |
| 524 | Calysta | Greek | Most beautiful. Calista was a Mythological Arcadian who transformed into a she-bear, then into the Great Bear constellation. | F | |
| 525 | Candance | Greek | Sparkling. | F | |
| 526 | Candice | Greek | Sparkling. | F | |
| 527 | Canisa | Greek | Very dear. | F | |
| 528 | Capaneus | Greek | One of the attackers against Thebes. | M | |
| 529 | Carissa | Greek | Very dear. | F | |
| 530 | Carrissa | Greek | Very dear. | F | |
| 531 | Caseareo | Greek | Long haired. | M | |
| 532 | Casey | Greek | Honorable. Biblical; acacia wood was used to build the wilderness Tabernacle. | F | |
| 533 | Cassandra | Greek | Unheeded prophetess. Cassandra was a Trojan prophetess, daughter of King Priam. In Homer's 'The Iliad' Cassandra's prediction of the fall of Troy was unheeded. | F | |
| 534 | Cassandrea | Greek | Unheeded prophetess. Cassandra was a Trojan prophetess, daughter of King Priam. In Homer's 'The Iliad' Cassandra's prediction of the fall of Troy was unheeded. | F | |
| 535 | Cassaundra | Greek | Unheeded prophetess. Cassandra was a Trojan prophetess, daughter of King Priam. In Homer's 'The Iliad' Cassandra's prediction of the fall of Troy was unheeded. | F | |
| 536 | Cassia | Greek | Spicy cinnamon. | F | |
| 537 | Cassie | Greek | Purity; unheeded prophetess. In Homer's 'The Iliad' Cassandra's prediction of the fall of Troy was unheeded. | F | |
| 538 | Cassiel | Greek | The guardian of Capricornians. | M | |
| 539 | Cassiopeia | Greek | Mother of Andromeda. | F | |
| 540 | Cassondra | Greek | Form of Cassandra. Unheeded prophetess. | F | |