| Name | Meaning | Gender | Origin |
|---|
| Bitty | Very small. Composed of fragments. | Unisex | |
| Blossom | lovely, A flower or cluster of flowers | Female | English |
| Bobo | | Male | Hebrew |
| Bonbon | | Unisex | Hebrew |
| Bongo | Connected drums played by beating with hands. | Unisex | |
| Bonita | Pretty little one.
| Female | Spanish |
| Bonsai | The art of growing dwarfed ornamental trees and shrubs. | Unisex | |
| Boo Boo | | Unisex | Hebrew |
| Boogie | | Unisex | Hebrew |
| Bootsy | | Unisex | Hebrew |
| Boris | A fighter, battler | Male | Slavic |
| Brendan | prince | Male | Irish |
| Brenna | Raven maid, dark-haired | Female | Irish |
| Brennan | Little drop: Prince. Variant of Brendan.
| Male | Irish |
| Brillo | Brand of pot cleaner - Brillo pads. | Unisex | |
| Brooke | small stream | Female | English |
| Brutus | heavy, dull | Male | Latin |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Male | |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Male | |
| 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 | |
| Bugsy | | Male | Hebrew |
| Bungee | | Male | |
| Bunny | little rabbit | Female | Nickname |
| Butterbean | | Unisex | Hebrew |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Female | |