Abraham Hilsum was a son of Elias Hilsum and Eva Druif. He married Olga Cohen in Amsterdam on July 30th, 1935. They divorced on 2 February 1942. He remarried Rebecca Leiseroff on 25 February 1942. His last known occupation was teacher at a Jewish school.
Stadsarchief Amsterdam, archiefkaart Abraham Hilsum
In addition, a Jokos file (number 18472) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.