- Jason"Luciferion"Austin 8
- Jasper 'Weenydog' Lodder 5
- Jaspos 23
- JasposDesign 2
- Javier "<<<P-tra_K>>>" 5
- Javier "PetrakeN" Braceras 6
- Jay 14
- Jay "Loosecontroll" Harrison 5
- Jay Tee 4
- Jaymian 16
- Jaymz aka [rm-rf]axeman 2
- Jaypeezy 3
- Jazz Burgess 13
- JbP 5
- Jean-Paul LeBreton 12
- Jefe 15
- Jeff 2
- Jeff "Mantis" Standridge 4
- Jeff "Monger" Randall 8
- Jeff "MuchFun" Whittaker 4
- Jeff "Sykes" Budge 6
- Jeff 'Flunders' Smyth 9
- Jeff 'Lehm' Adams 5
- Jeff 'Nightshift' Buhler 24
- Jeff Amaro 14
- Jeff Amaro (DarkAngel) 6
- Jeff Casper 2
- Jeff Martin 139
- Jeff McDonald 2
- Jeff Randall 4
- Jeff Wilson 2
- Jeff {Death4u2} Greer 2
- JeffWilson 2
- Jeffrey 14
- Jeffrey "Capp" Miner 4
- Jeffrey "Chronos" Flower 2
- Jeff{Death4u2}Greer 10
- Jekko 3
- Jeklo 2
- Jeklo_90.1 21
- Jen Tonon 2
- JennaJ-Bot 3
- Jennifer Diane Reitz 12
- Jennifer Diane Reitz lupa@otakuworld 2
- JenoLT 3
- Jens van Dijk 4
- Jensen "Tyfius" Somers 3
- Jeremiah 'Byte' Fulbright 6
- Jeremy 6
- Jeremy "Black_Plague" McEntee 2
- Jeremy "Faceless" Graves 37
- Jeremy War 32
- Jeremy War/Cliff Bleszinski 6
- Jeremy Wood 4
- Jeremy'SureShot'Whiting 31
- Jérémy's2hnt' 7
- Jerid ]Valkyrie[ Cossette 2
- Jerome Bos a.k.a. Bloeb 10
- Jerome-X 3
- Jerry "{LoD}Dr.Doom" Welch 3
- Jersey Devil 2
- Jesco "X-Terror-81" Topp 3
- Jesse (SuperAlgae) Banet 4
- Jesse The Body 2
- Jesús 3
- Jesús "N3oDoc" Díaz 25
- Jet<NxS> 2
- Jetlagg 4