Someone collected a bunch of verses here:
http://www.islamawareness.net/Jinn/jinn.html
Obviously you can ignore them if you want, and should, if game balance or coolness dictate.
I do think that the Djinn should be children of Catharsis, before he became Anthrax, in the same sense that Abysians are children of Rhuax. This would have made Catharsis the king of smokeless fire, before his fall - which dovetails to Iblis having been originally the coolest of the Djinn.