| Name | Meaning | Gender | Origin |
|---|
| Brutus | Heavy, slow, foolish | Male | Latin |
| Bryant | Noble, strong, virtuous | Male | Gaelic |
| Bubba | | Unisex | Hebrew |
| Buck | He-goat | Male | English |
| Bud | Brother. Nickname Used Since Medieval Times. | Male | English |
| Buddy | Herald | Male | English |
| Bugsy | | Unisex | Hebrew |
| Bull | The adult male of certain large animals like cattle and elephants | Unisex | English |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bully | An overbearing person, a ruffian | Unisex | English |
| Busta | | Unisex | Hebrew |
| Buster | One that breaks up something | Unisex | American English |
| Butch | Masculine in appearance or manner. | Unisex | American English |
| Buzz | To move quickly and busily, to bustle | Male | English |
| Caden | Little Fighter. | Unisex | English |
| Caesar | Long Hair | Male | Latin |
| Cain | A spear | Male | Hebrew |
| Calder | Uncertain, perhaps cold | Male | Norse |
| Callum | Dove | Male | Latin |
| Capone | | Unisex | Hebrew |
| Captain | A captain | Unisex | English |
| Carlo | Free man | Male | German |
| Cash | Cash | Unisex | English |
| Cassius | Empty | Male | Latin |
| Castor | Beaver | Unisex | Greek |
| Ceasar | Hairy Child, Long Haired | Male | Latin |
| Chance | Good fortune | Male | English |
| Chaos | Gaping void | Unisex | Greek |
| Charlie | Free man | Unisex | Germanic |
| Chase | Huntsman | Male | English |