Andrea,
Iris was married to Billy, one of the younger sons of Mary and Frank. I am the daughter of Rudy. I think the brother of your grandfather? What is his first name? I can think of Billy, Bobby, Rudy(my dad), Stonko, Johnny, Frankie, Andy, Louis (killed in ww2) Lenny. Hm. There's more! Another one killed in ww2. I am sure I am forgetting someone! Look for the Facebook page that one of the cousins started.
Someone once sent me the pages from a phone book in Yugoslavia which had TONS of Kne's. Not too many here!!