| Name | Meaning | Gender | Origin |
|---|
| Blizzard | Violent snowstorm | Male | |
| Blue | A colour between green and indigo. Gloomy or depressed. | Male | Color |
| Bo | Nickname made popular by actress Bo Derek.
| Male | Norse |
| Bob | bright, famous | Male | English |
| Bobby | bright fame | Male | English |
| Bocephus | | Unisex | Hebrew |
| Bogeyman | | Unisex | Hebrew |
| Bones | after doctor in Star Trek | Unisex | |
| Boo | | Male | Hebrew |
| Boo | | Male | Hebrew |
| Boo | | Male | Hebrew |
| Boo | | Male | Hebrew |
| Booger | | Unisex | Hebrew |
| Boozer | Excessive alcoholic drinker | Unisex | |
| Bouncer | One who bounds up and down | Unisex | |
| Brad | English, wide meadow | Male | English |
| Brady | large-chested | Male | Irish |
| Brew | | Unisex | Hebrew |
| Brody | From the muddy place. Surname.
| Male | Irish |
| Bruce | thicket, woodlands | Male | Scottish |
| Bryce | Son of a nobleman
| Male | English |
| Bubba | | Male | Hebrew |
| Bubba | | Male | Hebrew |
| Buck | A fleet footed youth. Male deer. | Male | English |
| Buckshot | | Unisex | Hebrew |