@Martin Engelmann.... (will this work? I'm new at this). My father, Peter, deserted the family when I was a baby, not seen again, died in 1974. My mother died in 2014, but certainly had no documentation on Martin. All the Engelmanns were in Germany (except Peter); I never knew any of them. One place I read that Martin married and had three children...couldn't find anything about that, either. I checked the Holocaust Museum site for Martin; not there.