Leo Maurits Gerard Kooperberg is the author of Erasmus als vredeskampioen (Den Haag 1936). He also wrote many headwords in the Nieuw Nederlandsch Biografisch Woordenboek.
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.