| Name | Meaning | Gender | Origin |
|---|
| Blitz | | Unisex | Hebrew |
| Bolt | | Unisex | Hebrew |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boris | Battle, fight | Male | Slavonic |
| Bram | Father of a multitude or many nations | Male | Hebrew |
| Brett | A Breton | Male | English |
| Brick | Bridge. | Male | English |
| Brock | Badger | Male | English |
| Bronson | Brown's son | Male | English |
| Bronwen | White-breasted | Female | Welsh |
| Bruiser | A large heavyset man | Unisex | English |
| Bruno | Armour | Male | Germanic |
| Brutus | Heavy, slow, foolish | Male | Latin |
| Buck | He-goat | Male | English |
| Bud | Brother. Nickname Used Since Medieval Times. | Male | English |
| Bugsy | | Unisex | Hebrew |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bully | An overbearing person, a ruffian | Unisex | English |
| 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 |
| Caesar | Long Hair | Male | Latin |
| Cain | A spear | Male | Hebrew |
| Caine | Reed, cane | Unisex | English |
| Calamity | | Unisex | Hebrew |
| Capone | | Unisex | Hebrew |
| Captain | A captain | Unisex | English |
| Carrie | Abbreviation Of Carol And Caroline From The Masculine Charles Meaning Manly | Female | English |
| Casper | Treasurer | Male | Persian |
| Ceasar | Hairy Child, Long Haired | Male | Latin |