| Name | Meaning | Gender | Origin |
|---|
| Big Red | | Unisex | Hebrew |
| Bijou | French for jewel | Female | |
| Biker | | Unisex | Hebrew |
| Bilbo | | Unisex | Hebrew |
| Bilbo Baggins | One of the hobbits in J.R. Tolkien's novels.
| Male | |
| Bill | comic-strip Bill the Cat | Male | English |
| Bingley | | Unisex | Hebrew |
| Binky | | Unisex | Hebrew |
| Biscuit | A cookie or cracker | Unisex | |
| Bjork | | Unisex | Hebrew |
| Black | Dark | Male | English |
| Black Jack | | Unisex | Hebrew |
| Blackhawk | | Male | |
| Blackie | Of the colour black. | Unisex | |
| Blackjack | A leather covered hand weapon. A card game | Unisex | |
| Blacky | | Male | Hebrew |
| Blake | fair-haired, pallid | Male | English |
| 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 |
| 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 |
| Bluebell | | Female | Hebrew |