Jett, Jaylen, Jarren, Jep.
I like Jace, Jensen, Jarid, Jake and Jacob.
How about
JAVEN/JAVIN or
JAYVEN
I'm not sure where you're from but here where i am my sons name is very common. Everyone says it differently but yeah. His name is Jesus. At first I wasn't so crazy about it but it grew on me :)
Also Jeshua is the same name as Jesus but pronounced & spelled differently
Jarren
Jensen
Jason
Jace
Jersey
Journie
Marcus
Mason
Micheal
Micah
I hope this helps.
If your going for unique how about Jia or Jude? Jenson isn't that common here in the U.K either :-)
Joseph Jayce James Julian Jonah Jason Jeremiah Justin Jeremy Joziah Johan
Judea...if you are due in July this is one of the biblical tribes of the 12 tribes of Israel and is the July tribe...
Joel james Javier Johnathan
Jaylen, Jarod, Jordan, Jayceon, Jacob
Justyn, Jordyn, Jared, Jayden, Jayson