Jonas Valk was married to Aaltje de Vries who lived at the Heerestraat in Groningen.
Addition of a visitor of the website
In addition, a Jokos file (number 54526) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lipp…