| Name | Meaning | Gender | Origin |
|---|
| Cassie | Abbreviation of Cassandra. Unheeded prophetess. In Homer's The Iliad Cassandra's prediction of the fall of Troy was unheeded.
| Female | English |
| Cecilia | blind one | Female | Latin |
| Cecily | blind | Female | Feminine |
| Cedric | Battle leader
| Male | Celtic |
| Celeste | heavenly | Female | Latin |
| Celine | after Celine Dion | Female | |
| Charlie | a man: variant of Carl.
| Male | English |
| Charlotte | petite and femininewoman, feminine of Charles | Female | |
| Cherry | Various trees that produce red to black fruit. | Female | Fruit |
| Cheyenne | Native American tribe living in the North West of the USA. | Female | |
| Chloe | Fresh young blossom, Greek for blooming | Female | Greek |
| Claire | bright, clear | Female | |
| Clarence | bright | Male | Latin |
| Clarissa | bright, clear | Female | Latinized |
| Clark | cleric, scholar | Male | English |
| Clem | Latin, mild, merciful | Male | |
| Clementine | mild, merciful | Female | |
| Cleo | From Cleopatra - Her father's glory | Female | Greek |
| Cleo | From Cleopatra - Her father's glory | Female | Greek |
| Constantine | steadfast | Male | Latin |
| Coral | Greek for small stone. Sincere or from the sea. Marine animal whose skeletons form coral reefs. | Female | Nature |
| Cordelia | In Shakespeare's King Lear a woman of rare honesty.
| Female | Latin |
| Cyril | lordly, proud | Male | Greek |
| Daenerys | | Female | Hebrew |
| Daisy | Day's eye. A flower name.
| Female | |