Jacobus Henri Polak worked as an office klerk in the Apeldoornse Bos, where he started working on 3 May 1942.
Municipal Archives Apeldoorn, list of employees of the Apeldoornsche Bosch
Two of Leonard Polaks children, Richard and Charles Polak, who lived at other addresses, didn't survive the war.
Addition of a visitor of the website
In addition, a Jokos file (number 16014) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting …