I knew John "The Greek" when he lived in Levittown. We were in our teens and got into quite a bit of trouble together. I've often wondered how he made out, and found your message in a google search for his name. I didn't know the rest of his family as neither of us spent a lot of time at home.
If you're successful in tracing him, I'd appreciate hearing from him or about him. I'll do the same for you.