Jonas Fride married in Amsterdam on 5 February 1942 to Bertha Zeehandelaar, daughter of Salomon Zeehandelaar and Abigael de Cunha.
City Archive of Amsterdam, archive card of Jacob Fride .
In addition, Jokos files (numbers 52268, 50229, 54285) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.