Benjamin de Leeuw was a son of Asser de Leeuw and Roosje Cohen.
Stadsarchief Amsterdam, archiefkaart Benjamin de Leeuw
In June 1940, an obituary was placed in the Nieuw Israëlietisch Weekblad for Benjamin de Leeuw. Benjamin de Leeuw was 60 years old when he died.
Nieuw Israëlietisch Weekblad, 7 June 1940