Roosje Berlijn and Willem Blom married in 1903 in Amsterdam. They had five children: Godschalk, a child that survived the war, Michel, Marianna and David.
Stadsarchief Amsterdam, archiefkaart Willem Blom
In addition, a Jokos file (number 52340) 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 1116 / 3683).