| Name | Meaning | Gender | Origin |
|---|
| Calamity Jane | | Unisex | Hebrew |
| Callie | Lark
| Female | Greek |
| Calypso | Greek for concealor. A type of music originating in the West Indies. Also a satellite of Saturn. | Male | Greek |
| Cameron | Clan name meaning Bent nose.
| Male | Scottish |
| Candy | Confectionery made with sugar. | Female | English |
| Captain | One who commands or leads others. Officer in command of ship, aircraft, police or fire station. | Male | |
| Carmel | From the vinyard
| Female | Hebrew |
| Carter | cart driver | Male | English |
| Casanova | A man who is gallantly attentive to women. | Male | |
| Casey | brave, watchful | Male | Irish |
| Cash | hollow | Male | Word |
| Casino | | Unisex | Hebrew |
| Caspar | keeper of the treasure | Male | Persian |
| Casper | Master of the treasure | Male | Dutch |
| Cassandra | prophet of doom | Female | Greek |
| Cassiopeia | Clever | Female | Greek |
| Castor | pious one | Male | Greek |
| Castro | | Unisex | Hebrew |
| Cat | pure | Female | English |
| Cat | pure | Female | English |
| Cat Stevens | | Unisex | Hebrew |
| Catalina | pure | Female | Spanish |
| Catrina | Blessed, Pure, Holy | Unisex | Irish |
| Cecilia | blind one | Female | Latin |
| Celeste | heavenly | Female | Latin |