I've never been intensively thinking about the names, but it's interesting.

The name Jazz I usually associated with coolness, I don't know why. More interesting is Spaz, whose name sounds like the name of a bird of spoken "in German". It's the same with Lori, which sounds close to another German word (I was young at that time I got JJ2, ok?)

Devan Shell? Hm.. I only remember that I found his name incredibly stupid. =P