Heintje Frenk was a daughter of Izaak Frenk and Rebecca Oppenheim. She was previously married to Frits van Dantzig.
Haags Gemeentearchief, overlijdensakte Heintje Frenk
In addition, a Jokos file (number 8132) 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 b…