| Name | Meaning | Gender | Origin |
|---|
| Buckley | Ram's clearing | Male | English |
| Buddy | Herald | Male | English |
| Buster | One that breaks up something | Unisex | American English |
| Buzz | To move quickly and busily, to bustle | Male | English |
| Caesar | Long Hair | Male | Latin |
| Cain | A spear | Male | Hebrew |
| Cairbre | Strong Man | Male | Celtic |
| Calhoun | Warrior | Male | English |
| Camden | Uncertain, perhaps winding valley | Male | English |
| Caolan | Slender | Unisex | English |
| Carey | Well loved | Male | Gaelic |
| Carlin | Descendant of Cearbhallán | Male | Gaelic |
| Carlo | Free man | Male | German |
| Carrick | Rock | Male | Gaelic |
| Casey | From Cayce | Male | American English |
| Cash | Cash | Unisex | English |
| Cassidy | Curly | Male | Gaelic |
| Cathal | Powerful in battle | Male | Gaelic |
| Cavan | Beautiful at birth | Male | Gaelic |
| Ceallach | War | Male | Gaelic |
| Chad | Defense | Male | English |
| Chaos | Gaping void | Unisex | Greek |
| Charlie | Free man | Unisex | Germanic |
| Chester | Camp | Male | Latin |
| Chief | One in highest rank or authority. | Unisex | English |
| Cian | Ancient | Male | Gaelic |
| Cillian | War | Male | Gaelic |
| Cinder | | Unisex | Hebrew |
| Clancy | Red | Male | Gaelic |
| Clarence | Of Clare | Male | English |