| Name | Meaning | Gender | Origin |
|---|
| Biggie | | Unisex | Hebrew |
| Bijou | Jewel | Unisex | French |
| Bingo | A game where numbers are drawn and announced by a caller | Unisex | English |
| Biscuit | A cookie or cracker | Unisex | English |
| Bisto | | Unisex | Hebrew |
| Bitsy | | Unisex | Hebrew |
| Blaze | Stuttering | Unisex | Latin |
| Blitz | | Unisex | Hebrew |
| Blossom | Blossom, flower | Female | English |
| Bobbi | Bright fame | Female | Germanic |
| Bobby | Bright fame | Unisex | Germanic |
| 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 |
| Brandy | Burning wine | Female | English |
| Briar | Thorny plant | Unisex | English |
| Brittany | Land of the Britons | Female | English |
| Brodie | Muddy place | Male | Gaelic |
| Brogan | Shoe | Unisex | Gaelic |
| Bronwyn | White breast | Female | Welsh |
| Bruce | Surname Since Medieval Times: Now A Common Given Name. Folklore Tale Of 14Th Century Robert King Of Scotland: (The Bruce) Who Learned The Value Of Perseverance From Watching A Spider Spin A Web. | Male | English |
| Bruiser | A large heavyset man | Unisex | English |
| Bruno | Armour | Male | Germanic |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Unisex | English |
| Buddy | Herald | Male | 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 |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |