Otto lived with his wife and stepchildren at Jenaer Str. 5 in Berlin-Wilmersdorf before they emigrated to Holland in 1936. The family was in hiding in Venlo when Otto and his stepson Walter Rosenthal were arrested by the German SD and shot on November 1st, 1944.
His wife Martha and daughter Ingeborg survived and emigrated from Sweden to California, USA in 1947.
(Sources: German Tax Warrants, Steuersteckbriefe, collected by Herbert Birett; entries in Dutch at http://historie.venlo.nl/)