| Name | Meaning | Gender | Origin |
|---|
| Bear | Large mammal with large head, bulky body and coarse thick fur | Unisex | English |
| Beau | Handsome | Male | French |
| Bebe | Baby | Male | English |
| Beebee | | Unisex | Hebrew |
| Billabong | | Unisex | Hebrew |
| Bingo | A game where numbers are drawn and announced by a caller | Unisex | English |
| Black | Dark | Unisex | English |
| Blade | Wealthy Glory | Male | English |
| Blaze | Stuttering | Unisex | Latin |
| Blitz | | Unisex | Hebrew |
| Blizzard | Violent snowstorm | Unisex | English |
| Blu | | Unisex | Hebrew |
| Blue | Blue | Unisex | English |
| Bob | Bright fame | Male | Germanic |
| Bogart | Orchard | Male | German |
| Bogey | | Unisex | Hebrew |
| Bolt | | Unisex | Hebrew |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boone | Good | Male | French |
| Brady | Descendant of Brádach | Unisex | Gaelic |
| Breezy | From Briseis The Woman Achilles Loved In Homer's Iliad. | Unisex | English |
| Brinley | Tawny | Male | English |
| Bristol | Bridge | Male | English |
| Brock | Badger | Male | English |
| Brodie | Muddy place | Male | Gaelic |
| Brody | Muddy place | Male | Gaelic |
| Bruno | Armour | Male | Germanic |
| Brutus | Heavy, slow, foolish | Male | Latin |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Unisex | English |
| Buck | He-goat | Male | English |