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Male Son Zeiss Click to view Son Zeiss in the family tree

1   Son's father was Frederick Zeiss and his mother was Margaret Zahn.  His maternal grandparents were Henry Zahn and Margaret Hannah Schidel. He had a brother and two sisters, named Adam, Elizabeth and Margaret.1 

1 basel.FTW
Further source/citation:
World Family Tree Vol. 9, Ed. 1 @ Tree #2571