Isaac Mug was the son of Abraham Mug and Sophia Plots. He was married to Mathilda de Wolf, the daughter of Levie de Wolf and Esther van Bever. A brother of Isaac Mug, Alexander, was married to her sister Sara.
Addition of a visitor of the website
In addition, a Jokos file (number 13344) 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 8655/19098).