| Name | Meaning | Gender | Origin |
|---|
| Bobby | Bright fame | Unisex | Germanic |
| Bobo | On tuesday born | Unisex | African |
| Bogey | | Unisex | Hebrew |
| Bongo | Connected drums played by beating with hands. | Unisex | English |
| Boo | | Unisex | Hebrew |
| Booker | A bleacher of cloth | Male | English |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boone | Good | Male | French |
| Boots | | Unisex | Hebrew |
| Boozer | Excessive alcoholic drinker | Unisex | English |
| Boris | Battle, fight | Male | Slavonic |
| Bradley | Broad wood | Male | English |
| Brady | Descendant of Brádach | Unisex | Gaelic |
| Brit | Strong Or From Britain | Unisex | English |
| Brodie | Muddy place | Male | Gaelic |
| Brody | Muddy place | Male | Gaelic |
| Brooke | A brook, stream | Unisex | English |
| Brownie | Moist chocolate cake with nuts | Unisex | English |
| Bruiser | A large heavyset man | Unisex | English |
| Bruno | Armour | Male | Germanic |
| Brutus | Heavy, slow, foolish | Male | Latin |
| Bubba | | Unisex | Hebrew |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Unisex | English |
| Buck | He-goat | Male | English |
| Bucky | | Unisex | Hebrew |
| Bud | Brother. Nickname Used Since Medieval Times. | Male | English |
| Budda | | Unisex | Hebrew |
| Buddy | Herald | Male | English |
| Bug | An insect. A disease-producing microorganism. An error in coding or logic that causes a malfunction in a computer a program. An electronic listening device. An enthusiasm. Slang for annoy. | Unisex | English |
| Bugsy | | Unisex | Hebrew |