521325 was married to Betje Klaartje Bilderbeek. He was a diamond cutter by trade. Their son 536535 was born in Westerbork transit camp on 12 March 1943.
City Archive of Amsterdam, card Alexander Verdooner
Record of birth certificates of the Westerbork municipality, currently at the archives of Gemeente Midden-Drenthe in Beilen
Biography