Thank you - this is definately the right family.
Sheldon was, as you know, adopted. He had a twin brother named Gerald.
Sheldon and Geralds birth parents were Olga (Magnuson) and Henry Gimple. Olga was my grandmothers younger sister.
Sheldon and Gerald were concieved out of wedlock. Olga and Henry did marry, but in those days they could not afford to feed both children so they were forced to give one up for adoption. That was Sheldon. It was an "open" adoption in the fact that they all knew about the situation. Or this is at least what my mother has told me.
My mother knew Sheldon when he was young - quite young.
I would love further information if you are willing to share it. You can contact me at firstname.lastname@example.org
Thank you so much!