Wow. I never noticed that Devan Shell rhymes perfectly with Heaven Hell. Awesome.
I was just about to accuse you of overinterpreting things, but the meanings of Eva's and Zoe's names.. it would be a strange coincidence. Either that, or he who named Zoe overinterpreted just as much as you.

About Jazz.. I always sort of associated him with the music, actually.
Well, not Jazz music itself, at least not in particular. But besides that one of the most outstanding features of Jazz Jackrabbit's games is the absolutely awesome music, his personality is pretty musical as well, if you allow me to be that abstract.
He just sort of flows with things while being dynamic, never losing his cool. That's like having your own rythm to life which you never lose.
He's kind of like Obi Wan in that way.
"*destroys evil droid lord after a long, hard battle*
...Tsk. So uncivilized."
So, in essence, Jazz = Jedi.