| Name | Meaning | Gender | Origin |
|---|
| Bristol | Bridge | Female | English |
| Brit | Of Bretagne, France | Unisex | Irish |
| Britta | strength, power | Female | Scandinavian |
| Brittany | A Britain. | Female | English |
| Brooke | small stream | Female | English |
| Brooklyn | Beautiful Brook | Female | English |
| Brooks | of the brook | Male | English |
| Brutus | heavy, dull | Male | Latin |
| Buddy | From Budd - The welcome messenger. | Male | English |
| Buddy | From Budd - The welcome messenger. | Male | English |
| Budweiser | Brand of American beer | Unisex | |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Male | |
| Bunny | little rabbit | Female | Nickname |
| Burgundy | Region Of France, Color Of Wine | Male | English |
| Buster | One that breaks up something | Male | Modern |
| Butler | Butler | Male | English |
| Butter | | Unisex | Hebrew |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Female | |
| Buttercups | | Unisex | Hebrew |
| Butterfly | Butterfly | Female | English |
| Butternut | | Unisex | Hebrew |
| Butterscotch | | Male | Hebrew |
| Buttons | | Male | Hebrew |
| Cain | and Able | Male | Hebrew |
| Cairo | City In Egypt | Male | English |