Izak Isaac was married to Helena Blanes. He was a public servant at the Postal Services. Their third child, a daughter named Nannie Esther, was born in transit camp Westerbork on 25 April 1943.
Record of birth certificates of the Westerbork municipality, currently at the archives of Gemeente Midden-Drenthe in Beilen
We have been unable to determine whether one or more members of this family survived the war. While their names do not appear on the lists of survivors, we have not been able to trace them in In Memoriam either. They are therefore labeled as 'surviving' and their names are not listed.