I prefer
Justin to
Jason.
I just plain wouldn't use
Jason... so I guess I'll look at what might sound ok w/
Justin.
I personally would use a Jpns. name with
Justin, but since that's prob'ly not quite what you're looking for, I'll give you some other options (though I think it would sound nice w/
Akira if you want at least 1 Jpns. example):
LeviPascalSamuel (preferably w/ Span. prn.)
MateoRaphaelAlexanderGabrielJoseXavierIsraelEzekielIsaiahMalachiCharlesBlakeBryceElijahFritzMaxwellOliverAbrahamGavrielAzariahEliezerFelipeLaviArielEzraLeonardoReginaldMiguelZacharyZachariahGregoryFranciscoLyleAlejandro