Lazarus Nachum Cohen was a widower of Sara van Buren. She was born on 4 April 1869 in Geldermalsen and she died in Amsterdam on 29 December 1938.
Amsterdam municipal archive, Records Jokos, Möbel-claim; property Joods Maatschappelijk Werk
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had an ironmonger's shop, address: Lijnbaansgracht 29/30 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives