Hi, Susanne: Somehow I missed seeing your message regarding the details concerning Barbara and Wilfred Straight Holtzman. Yes, I would like to have any details concerning their families, you can email me direct at Rickl60@cox.net (that's an L, not a 1, before the 60).
Quite interesting the mention that Wilfred might have studied under Frank Lloyd Wright. I don't know offhand how to go about finding out if this is fact or fantasy. I may do a little looking around just to see what I can find.