| Name | Meaning | Gender | Origin |
|---|
| 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 |
| Bullwinkle | | Unisex | Hebrew |
| Bully | An overbearing person, a ruffian | Unisex | English |
| Burke | A fortification | Male | German |
| Burt | Bright | Male | Germanic |
| 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 |
| Byron | At the cattle sheds | Male | English |
| Caesar | Long Hair | Male | Latin |
| Cain | A spear | Male | Hebrew |
| Caine | Reed, cane | Unisex | English |
| Calvin | Bald | Male | French |
| Camden | Uncertain, perhaps winding valley | Male | English |
| Cannon | Canon | Male | English |
| Capone | | Unisex | Hebrew |
| Captain | A captain | Unisex | English |
| Carrot | | Unisex | Hebrew |
| Cash | Cash | Unisex | English |
| Caspar | Treasurer | Male | Persian |
| Cassius | Empty | Male | Latin |
| Ceasar | Hairy Child, Long Haired | Male | Latin |
| Chad | Defense | Male | English |
| Chance | Good fortune | Male | English |
| Chandler | Candle seller | Male | English |
| Charlie | Free man | Unisex | Germanic |
| Chase | Huntsman | Male | English |