Berthold Joël van Geldere was a son from the first wedlock of Hartog van Geldere and Jettchen Goldberg. Berthold was born on 9 June 1898 in Den Haag. He married on 9 January 1929 in Rotterdam Sientje Elizabeth Bosman, who was born there on 6 July 1897 as a daughter of Isaac Bosman and Engeltje Polak…
In addition, a Jokos file (number 52052) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.