I like Jude and Kit.
Personally I would not choose anything like Jack, popular names just become SO common and boring - but some people like that...
I don't know how popular Jude honestly is, I don't know of any Jude's here. I really like Kit, and don't think there is anything wrong with something a bit out there. Kitson is sweet aswell.
You seem to like names with a J so here are a few others...
Jules/Julian
Jasper
Jacob (quite common too)
Jenson (rising in popularity)
Jackson
Joel
Jonah
Jet