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Male John DeSudeley Click to view John DeSudeley in the family tree

1   John's father was Harold DeMantes and his mother was Matilda Unknown.  His paternal grandparents were Rudolph DeMantes and Gethe Unknown; his maternal grandparents were Hugh-Lupus and Ermentrude. He had a brother named Robert.1 

Family Details of John's family with Grace De Tracy

1 2931.ftw
Further source/citation:
World Family Tree Vol. 27, Ed. 1 @ Tree #2931