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Male Dielman Kolb Click to view Dielman Kolb in the family tree

1   Dielman's father was Dielman Kolb and his mother was Unknown Schumacker.  His maternal grandfather was Peter Schumacker. He had four brothers and a sister, named Jacob Schumacker, Henry Schumacker, Johannes, Peter Schumacker and Ann Schumacker.1 

1 phelps.FTW @ Tree #1353
Further sources/citations:
World Family Tree Vol. 4, Ed. 1 @ Tree #0574, 0574.ftw