| Name | Meaning | Gender | Origin |
|---|
| Bliss | Supreme happiness | Female | English |
| Blossom | Blossom, flower | Female | English |
| Blu | | Unisex | Hebrew |
| Blue | Blue | Unisex | English |
| Blueberry | | Unisex | Hebrew |
| Bonnie | Pretty | Female | English |
| Bonsai | The art of growing dwarfed ornamental trees and shrubs. | Unisex | English |
| Boo | | Unisex | Hebrew |
| Boots | | Unisex | Hebrew |
| Brandy | Burning wine | Female | English |
| Brooklyn | Uncertain, perhaps broken land | Unisex | Dutch |
| Brownie | Moist chocolate cake with nuts | Unisex | English |
| Brunhilda | Battle armour | Unisex | Germanic |
| Bubblegum | | Unisex | Hebrew |
| 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 |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bunny | Little rabbit | Female | English |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Unisex | English |
| Butterscotch | | Unisex | Hebrew |
| Buttons | | Unisex | Hebrew |
| Cairo | Victorious one | Unisex | Arabic |
| Cali | Most beautiful | Female | English |
| Callie | Most beautiful | Female | Greek |
| Cameo | Delicate,carved relief | Unisex | English |
| Candie | Fire-white | Female | Greek |
| Candy | Honest | Female | Latin |
| Caramel | A smooth chewy candy | Unisex | English |
| Carly | Free man | Female | German |