Im writing this for my mother who's email will be restored next week. My mother knew the Bennigsen family and said that her sister went to school with ILSE Bennigsen in Barsinghausen. Ilse and her family lived on Markt Strasse in a Bauernhof (ranch home). My email address is firstname.lastname@example.org
which is easier to communicate through than this reply board, should you want more info. My mother will contact her sister to get more info on ILSE.
Good luck in your search for info.