| Name | Meaning | Gender | Origin |
|---|
| Cairo | Victorious one | Unisex | Arabic |
| Capone | | Unisex | Hebrew |
| Captain | A captain | Unisex | English |
| Carmella | Garden | Unisex | Hebrew |
| Casey | From Cayce | Male | American English |
| Casper | Treasurer | Male | Persian |
| Cassidy | Curly | Male | Gaelic |
| Cassius | Empty | Male | Latin |
| Cecil | Blind | Male | Latin |
| Chad | Defense | Male | English |
| Chancellor | Administrative official | Male | English |
| Chaos | Gaping void | Unisex | Greek |
| Charley | Free man | Unisex | German |
| Charlie | Free man | Unisex | Germanic |
| Chase | Huntsman | Male | English |
| Checkers | | Unisex | Hebrew |
| Chester | Camp | Male | Latin |
| Chief | One in highest rank or authority. | Unisex | English |
| Chum | | Unisex | Hebrew |
| Chunky | Short, thick and stocky. Also means containing small pieces like chunky soup or stew. | Unisex | English |
| Clyde | Refers To The Scottish Clyde River. | Male | Gaelic |
| Coco | A Pet Name. | Unisex | French |
| Cody | Descendant of Cuidighthigh | Male | Gaelic |
| Comet | A celestial body | Unisex | English |
| Conan | Little wolf hound | Male | Gaelic |
| Cookie | A small flat, crisp cake | Unisex | English |
| Copper | A reddish brown metal - as in copper penny coins. Also slang for a police officer. | Unisex | English |
| Crackers | | Unisex | Hebrew |
| Critter | | Unisex | Hebrew |
| Crunch | | Unisex | Hebrew |