Betje van Geldere was a daughter of Saul van Geldere and Sientje Fransman. She was born on 3 October 1898 in Doesburg and she married Jacob Augurk on 3 June 1931 in Amsterdam. He was a son of Leendert Augurk and his 2nd spouse Katharina van Thijn. Leendert's 1st wife Rosa Bernhard died in childbirth…
In addition, a Jokos file (number 50745) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.