Isaac Mathijse and Elisabeth Klaster had three children. One child was married and lived with her husband at the same address as her parents. This child survived the war.
Addition of a visitor of the website
In addition, a Jokos file (number 40100) on this family 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 Lippmann-Rosenthal looting bank (L-claim, number 8060/4700).