Emma and Emil were first cousins once removed. Emma's parents were second cousins: four of her eight great grandparents were Gassmann siblings.

Listed in the 1939 census of Berlin at Wuerttembergische Strasse 33,I; no other obvious family members are listed at this address.

Yad Vashem lists an Emma Epstein, born Emma Apt in Gross Strehlitz on 29.08.1871. She was transported on 11.08.1942 from Berlin to Theresienstadt where she died on 19.08.1942.