| Name | Meaning | Gender | Origin |
|---|
| Baron | Freeman | Male | Germanic |
| Bart | Son of Talmai | Male | Greek |
| Baxter | Baker | Male | English |
| Bb | | Unisex | Hebrew |
| Beamer | Trumpeter | Unisex | English |
| Beanie | | Unisex | Hebrew |
| Bear | Large mammal with large head, bulky body and coarse thick fur | Unisex | English |
| Beau | Handsome | Male | French |
| Beauty | One that is beautiful, especially a woman | Unisex | English |
| Bebe | Baby | Male | English |
| Ben | Son | Male | Hebrew |
| Benny | Son of my right hand | Male | Hebrew |
| Benson | Son of Benedict | Male | English |
| Bentley | Bent grass clearing | Male | English |
| Bernie | Bear brave | Male | German |
| Biggie | | Unisex | Hebrew |
| Billie | Will, desire and helmet, protection | Unisex | Germanic |
| Billy | Will, desire and helmet, protection | Male | Germanic |
| Bingo | A game where numbers are drawn and announced by a caller | Unisex | English |
| Binky | | Unisex | Hebrew |
| Birdy | Birdlike | Unisex | English |
| Biscuit | A cookie or cracker | Unisex | English |
| Bishop | Overseer | Male | English |
| Bitsy | | Unisex | Hebrew |
| Bj | | Unisex | Hebrew |
| Blackie | Of the colour black. | Unisex | English |
| Blaze | Stuttering | Unisex | Latin |
| Blondie | Pale yellowish-brown | Unisex | French |
| Blue | Blue | Unisex | English |
| Bob | Bright fame | Male | Germanic |