Jacob Cohen married Sientje Tokkie in 1915 in Amsterdam. She passed away in 1930. They had five children: David, Abraham and the here mentioned Sophia, Andries and Hijman. He remarried in 1936 in Amsterdam to Roosje de Leeuwe.
Stadsarchief Amsterdam, archiefkaart Jacob Cohen
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had a shoemaker's workshop, address: Blasiusstraat 79 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives