| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 521 | Cim | English | Ruler. | F | |
| 522 | Cimberleigh | English | From the royal meadow. | F | |
| 523 | Cinda | English | Abbreviation of Cynthia and Lucinda. | F | |
| 524 | Cindel | English | Abbreviation of Cynthia and Lucinda. | F | |
| 525 | Cinderella | English | Little cinder girl. The name of a fairy-tale heroine. | F | |
| 526 | Cindi | English | Abbreviation of Cynthia and Lucinda. | F | |
| 527 | Cindia | English | Abbreviation of Cynthia and Lucinda. | F | |
| 528 | Cindy | English | Dimunitive of Cynthia, Lucinda, and Cinderella. | F | |
| 529 | Cirilla | English | Mistress; lady. Feminine of Cyril. | F | |
| 530 | Cis | English | Diminutive of Christie: Diminutive of any name begining with Christ-, for example Christahel, Christian, or Christopher. Variant of Christiana. Follower of Christ. Diminutive of Cecilia: A feminine form of Cecil, meaning blind. | F | |
| 531 | Ciss | English | Diminutive of Christie: Diminutive of any name begining with Christ-, for example Christahel, Christian, or Christopher. Variant of Christiana. Follower of Christ. Diminutive of Cecilia: A feminine form of Cecil, meaning blind. | F | |
| 532 | Cissie | English | Diminutive of Christie: Diminutive of any name begining with Christ-, for example Christahel, Christian, or Christopher. Variant of Christiana. Follower of Christ. Diminutive of Cecilia: A feminine form of Cecil, meaning blind. | F | |
| 533 | Cissy | English | Diminutive of Christie: Diminutive of any name begining with Christ-, for example Christahel, Christian, or Christopher. Variant of Christiana. Follower of Christ. Diminutive of Cecilia: A feminine form of Cecil, meaning blind. | F | |
| 534 | Claefer | English | Clover. | F | |
| 535 | Clare | English | A variant of Clara. St Clare (or Clara) of Assisi founded the Poor Clares order of nuns in the early 12th century. | F | |
| 536 | Claressa | English | Variant of Claire or Clarice. Bright; shining and gentle; famous. | F | |
| 537 | Claresta | English | Brilliant. | F | |
| 538 | Claribel | English | A variant of the Latin Clara, meaning bright or clear. | F | |
| 539 | Clarice | English | A variant of the Latin Clara, meaning bright or clear. also a variant of Claire or Clarice. Bright; shining and gentle; famous. | F | |
| 540 | Clarinda | English | A variant of Clara. The name Clarinda appears in Spenser's 16th century poem 'The Faerie Queene'. | F | |