More information about Joseph Abrahams and his family can be found in R.A. Levisson and H.C. Hurts-Levisson, Het verhaal van de families Levisson en Simons.
In addition, a Jokos file (number 8077) 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 64/10769).