Boys' J

Jace
Jacen
Jachai
Jack
Jackson
Jacob
Jacoby
Jad
Jaden (boy)
Jaeger
Jagger
Jaime (boy)
Jakarious
Jake
Jakmon
Jakob
Jakoda
James
Jameson
Jamisen
Janos
January (boy)
Jared
Jarek
Jaret
Jareth
Jaron
Jarren
Jarvis
Jascha
Jason
Jasper
Javen
Javier
Javion
Jaxon
Jaxton
Jay
Jayce
Jaycen
Jaycon
Jayden
Jaydin
Jayke
Jaylan
Jaylen
Jayse
Jaysen
Jayvon
Jeb
Jed
Jedidiah
Jefferson
Jeffery
Jeon
Jeramey
Jeremey
Jeremiah
Jeremy
Jericho
Jerome
Jeron
Jesse
Jet
Jethren
Jetlan
Jevon
Jimmy
Joaquin
Joe
Joel
Johannes
John
Johnathan
Jonah
Jonas
Jonathan
Jonathon
Jordan (boy)
Jorge
Jorin
Jory
Josef
Joseph
Josh
Joshe
Joshua
Josiah
Joss (boy)
Journey (boy)
Juan
Judah
Jude
Judson
Jules
Julian
Julien
Jupiter
Justice
Justin
Justus
Jusup