Went online last night and found a 1956 Buffalo City directory - there are 2 Biebers - Harry (Hilda) my father, and Heny A. (Beatrice). Who would have thought!
Not sure where to go now. Guess I need to do some more digging. Somewhere I saw there were 2 Heinrich Biebers coming to USA about the same time, but didn't keep that source. I'll let you know if/when I find it again.