| Name | Meaning | Gender | Origin |
|---|
| Calypso | Conceal | Female | Greek |
| Candy | Honest | Female | Latin |
| Capone | | Unisex | Hebrew |
| Captain | A captain | Unisex | English |
| Casey | From Cayce | Male | American English |
| Cash | Cash | Unisex | English |
| Casper | Treasurer | Male | Persian |
| Cassidy | Curly | Male | Gaelic |
| Cassie | She who entangles men | Female | Greek |
| Cassius | Empty | Male | Latin |
| Chad | Defense | Male | English |
| Chance | Good fortune | Male | English |
| Chaos | Gaping void | Unisex | Greek |
| Charley | Free man | Unisex | German |
| Charlie | Free man | Unisex | Germanic |
| Checkers | | Unisex | Hebrew |
| Cherokee | People Of A Different Speech. One Of The Largest American Indian Tribes. | Unisex | English |
| Cheyenne | Speak incoherently | Female | American English |
| Chief | One in highest rank or authority. | Unisex | English |
| Chloe | Means | Female | English |
| Chubbs | Rounded and plump. | Unisex | English |
| Chum | | Unisex | Hebrew |
| Chunky | Short, thick and stocky. Also means containing small pieces like chunky soup or stew. | Unisex | English |
| Cleo | Of a well known father | Female | Greek |
| Clyde | Refers To The Scottish Clyde River. | Male | Gaelic |
| Coco | A Pet Name. | Unisex | French |
| Coda | Passage at the end of a composition that brings it to a close. | Unisex | English |
| Cody | Descendant of Cuidighthigh | Male | Gaelic |
| Comet | A celestial body | Unisex | English |
| Conan | Little wolf hound | Male | Gaelic |