Bertha van Gelder was a daughter of Leendert Joseph van Gelder and Henderina van Vriesland. She married Jacobus van Dam in Den Haag on 7 November 1923, who was previously married to Lena Visser. He was a son of Isaac van Dam and Alida Bronkhorst.
Bertha van Gelder was born in a family with ten child…
In addition, a Jokos file (number 32208) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.