| Name | Meaning | Gender | Origin |
|---|
| Black Panther | | Unisex | |
| Black Puma | | Unisex | |
| Blackberry | Prickly shrub with small edible berries | Female | |
| Blackest | | Unisex | |
| Blackie | Of the colour black. | Unisex | |
| Blackjack | A leather covered hand weapon. A card game | Unisex | |
| Blackout | | Unisex | Hebrew |
| Blackster | | Unisex | |
| Blacktop | | Unisex | |
| Blais | Lisp; Stutter. Blaise Pascal Was A Brilliant Seventeenth Century Child Prodigy; Mathematician; Scientist And Philosopher Who Invented The Calculating Machine And Hydraulic Press Before Dying At Age Thirty-Nine. | Unisex | French |
| Blaise | to lisp, stammer | Male | |
| Blanche | white | Female | |
| Blaze | Lisp: stutter. Blaise Pascal was a brilliant seventeenth century child prodigy: mathematician: scientist and philosopher who invented the calculating machine and hydraulic press before dying at age thirty-nine.
| Male | Latin |
| Blazepaw | | Unisex | Hebrew |
| Blinky | | Male | Hebrew |
| Blizzard | Violent snowstorm | Male | |
| Blossom | lovely, A flower or cluster of flowers | Female | English |
| Blu | | Unisex | Hebrew |
| Blu | | Unisex | Hebrew |
| Blue | A colour between green and indigo. Gloomy or depressed. | Male | Color |
| Bo Peep | | Female | Hebrew |
| Boaz | swiftness | Male | Hebrew |
| Bob The Builder | | Unisex | Hebrew |
| Bobby | bright fame | Male | English |
| Bobby Wasabi | | Unisex | Hebrew |