Mixing our Jo(h)n Stewarts
The Raggirls had pointed out that none of the Superfriends appear to be Jewish. The cover of Superfriends #10, however, has convinced them that John Stewart -- like his h-less peer -- is a member of the Tribe. Knowing of nothing recent and canonical to contradict it, I'm going along with it.
Except for the minor hubristic incident in which billions of people died in Cosmic Odyssey due to his mistake, I can't imagine any Jewish parents who would be unhappy to have the Super Friends' Green Lantern as a son-in-law.