Entertainment
- JB (singer) (born 1994), South Korean singer
- Jack Black (born 1969), American comedian, actor, and musician
- James Bond, a fictional character in the film series James Bond 007
- James Brown (1933-2006), American singer and originator of Funk music
- Jeremy Borash (born 1974), American professional wrestling personality
- Joey Belladonna (born 1960), lead singer of heavy metal band Anthrax
- John Bush (musician) (born 1963), lead singer of heavy metal band Armored Saint
- Jonas Brothers, an American band consisting of Joe Jonas, Nick Jonas, and Kevin Jonas
- Justin Bartha (born 1978), American actor
- Justin Bieber (born 1994), Canadian singer and actor
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