Hertha was the daughter of Siegfried and Sara Buttermilch, née Salinger. Hertha was murdered in Sobibor on 23 March 1943; her husband had died in Amsterdam 3 February 1943. Her siblings Dr. Max Buttermilch and Leo Buttermilch perished in Theresienstadt and Gertrud Goldstein, née Buttermilch was murdered in Treblinka.