Paternal great-grandfather of paper salesman Dwight Schrute. All we know about Dwide Schrude is that he was Amish and had a son, grandson and great-grandson who were all named Dwight Schrute.
Dwight Schrute: My father's name was Dwight Schrute. My grandfather's name was Dwight Schrute. His father's name, Dwide Schrude."