| Name | Meaning | Gender | Origin |
|---|
| Blu | | Unisex | Hebrew |
| Blue | Blue | Unisex | English |
| Bo | Handsome | Female | French |
| 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 |
| Brandy | Burning wine | Female | English |
| Bree | The exalted one | Female | 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 |
| Bucket | | Unisex | Hebrew |
| Bud | Brother. Nickname Used Since Medieval Times. | Male | English |
| Buddy | Herald | Male | English |
| Bugsy | | Unisex | Hebrew |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Buster | One that breaks up something | Unisex | American English |
| Cadence | Rhythm | Female | English |
| Caesar | Long Hair | Male | Latin |