Nathan Muller and Helene Aschoff had five children: Samuel Liefman, Nathan Albert and three children who survived the war.
Gerard Vaanholt, 'Het droevig lot van de apotheker Leo Muller', in: De Twentsche Courant Tubantia, 31 March 2007
In addition, a Jokos file (number 10050) 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 8686/12710).