Thanks so much for replying! I've found lots of maybes as well, and it's driving me nuts.
And you know, I'll bet that is Mae! Why did I not see her in my ancestry.com search? I have exhausted my free 2 weeks, so I'll have to resubscribe and get that info.
I will also do the social security thing. It's nice to talk to people like you who can lead me, because I'm really new at this. (Though I am LOVING it!) That is Floyd, as he died young at age 47, and I've seen that on ancestry.com. I did not see the McKinley High pic. I saw a Princeton University yearbook photo, but not the high school one.
And yes, I thought about the sister thing. My dad always said he "came from a long line of only sons, so for years I thought that they were only children but realized that, duh!, there could be daughters in there. The only problem is that I don't know how true that statement was.
Anyway, thank you SOOOO much for your help! I'm going to find these people if it kills me...