| Name | Meaning | Gender | Origin |
|---|
| Bella | My God is a vow | Female | Hebrew |
| Belle | Beautiful | Female | French |
| Bennett | Blessed | Unisex | Latin |
| Berry | A berry | Unisex | English |
| Bingo | A game where numbers are drawn and announced by a caller | Unisex | English |
| Binky | | Unisex | Hebrew |
| Bitsy | | Unisex | Hebrew |
| Blossom | Blossom, flower | Female | English |
| Bobo | On tuesday born | Unisex | African |
| Bongo | Connected drums played by beating with hands. | Unisex | English |
| Bonita | Pretty | Female | Spanish |
| Bonsai | The art of growing dwarfed ornamental trees and shrubs. | Unisex | English |
| Bootsy | | Unisex | Hebrew |
| Boris | Battle, fight | Male | Slavonic |
| Brendan | Prince | Male | Gaelic |
| Brenna | Hill | Female | Welsh |
| Brennan | Descendant of Braonán | Male | Gaelic |
| Brillo | Brand of pot cleaner - Brillo pads. | Unisex | English |
| Brooke | A brook, stream | Unisex | English |
| Brutus | Heavy, slow, foolish | Male | Latin |
| Brynn | Hill | Unisex | Welsh |
| Bryony | Vine | Female | Greek |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Unisex | 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 |
| Bunny | Little rabbit | Female | English |
| Butterbean | | Unisex | Hebrew |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Unisex | English |
| Buttons | | Unisex | Hebrew |
| Buzz | To move quickly and busily, to bustle | Male | English |