In the 1939 census of Berlin Ernst and his brother Curt, both doctors of law, were listed at Sensburger Allee 23; no other obvious family members were listed at this address. Both brothers were deported from Berlin to Auschwitz concentration camp on 28.06.1943.

Possibly the widow of Toni geb. Landsberg who lived in Berlin and died 19.03.1937, and father of Steffi Mueller geb. Wachsner, born in Berlin on 08.05.1911, died in Indiana, USA on 29.01.2000. On the other hand, berlin.de says he remained unmarried.