Willem de Wolf was a son from the first marriage of his father Jacob de Wolf and Rebecca Blog, who passed away in 1932. Willem married Meintje Kool on 25 October 1933 in Amsterdam, a daughter of Elias Kool and Betje Lucasse. The couple had a son Jacob, who has been killed in Sobibor on 11 June 1943, together with his mother. Willem was killed there on 9 July 1943. The family resided at Plantage K…