| Name | Meaning | Gender | Origin |
|---|
| Blue | Blue | Unisex | English |
| Bobby | Bright fame | Unisex | Germanic |
| Bobo | On tuesday born | Unisex | African |
| Bojangles | | Unisex | Hebrew |
| Bonkers | | Unisex | Hebrew |
| Bonnie | Pretty | Female | English |
| Boo | | Unisex | Hebrew |
| Booboo | | Unisex | Hebrew |
| Booger | | Unisex | Hebrew |
| Booma | | Unisex | Hebrew |
| Boomer | A large full grown kangaroo. A baby boomer. | Unisex | English |
| Boot | | Unisex | Hebrew |
| Bootsy | | Unisex | Hebrew |
| Brook | A brook, stream | Female | English |
| Bubba | | Unisex | Hebrew |
| Bubbles | Thin spherical liquid filled with gas. Irrepressible activity. | Unisex | English |
| Buckwheat | | Unisex | Hebrew |
| Buddha | | Unisex | Hebrew |
| Bullet | A metal cylinder shot from a rifle or gun. Used to express speed. | Unisex | English |
| Bumper | | Unisex | Hebrew |
| Bunny | Little rabbit | Female | English |
| Burrito | A flour tortilla wrapped around a filing of beef, beans or cheese | Unisex | English |
| Butt | | Unisex | Hebrew |
| Butter | | Unisex | Hebrew |
| Butterbean | | Unisex | Hebrew |
| Buttercup | A bright yellow flowered plant. Also a term of endearment. | Unisex | English |
| Butterscotch | | Unisex | Hebrew |
| Buttons | | Unisex | Hebrew |
| Cadbury | Brand of chocolate | Unisex | English |
| Cadence | Rhythm | Female | English |