- John's Children -- Jollymusic
- Jollypickles -- Jon Hardy
- Jon Hardy and the Public -- Jon Simpson
- Jon Sine -- Jonathan Besser
- Jonathan Best -- Jonathan Routh
- Jonathan Roy -- Jonni Vishuddha
- Jonnie -- Jordan Bentley
- Jordan Berlant -- Jorge 'Che' Sareli
- Jorge Chicoy -- Jorma Koskisen Hittiparaati
- Jorma Lyytinen -- Jose Colón
- Jose Conde -- Jose Moro
- José Mucavele -- Josep Navarro
- Josep Peira -- Josep Soto