Hersch Leib Beck and Jaantje Snoek had a daughter Gusta.
Haags Gemeentearchief, gezinskaart Hersch Leib Beck
In addition, a Jokos file (number 53182) 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 1).