Jack
Jacko
Jackob
Jaco
Jacob
Jaemes
Jake
Jakob
James
Jamez
Jamick
Jamie
Jan
Jan-Erik
Janek
Janich
Janick
Janik
Jannick
Jannik
Janus
Jarl
Jason
Jasper
Jay
Jef
Jeff
Jeffi
Jeffrey
Jeffy
Jens
Jens-Christian
Jens-Erik
Jens-Henrik
Jens-Jacob
Jens-Jakob
Jens-Jørgen
Jens-Jørn
Jens-Kristian
Jens-Martin
Jens-Ole
Jens-Otto
Jens-Ove
Jens-Peter
Jens-Ulrik
Jens-Aage
Jensmartin
Jenspeter
Jensuffe
Jeppe
Jeremy
Jesper
Jesperjoe
Jesus
Jim
Jimi
Jimm
Jimmi
Jimmie
Jimmy
Joachim
Joachin
Joacim
Joackim
Joakim
Joe
Joh
Johan
Jóhann
Johann
Johannes
Johannesh
Johanpeder
John
John-Erik
Johnas
Johnbirk
Johni
Johnn
Johnni
Johnnie
Johnny
Jolan
Jon
Jonah
Jónas
Jonas
Jonatan
Jonathan
Jonaz
Jones
Jonn
Jonnas
Jonny
Jordan
Josef
Joseph
Josh
Joshua
Joshva
Jostein
Josua
Josva
Jozef
Jozsef
Jukas
Julian
Julianus
Julias
Julio
Julius
Jusef
Justin
Jønne
Jøren
Jørgen
Jørn
Jørn-Erik
Jørn-Ole