Isaac Witsenhuijsen was a son of Abraham Witsenhuijsen and Clara Waterman. He married on 20 October 1915 in Amsterdam to the 28-year old Vrouwtje Velleman, daughter of Levie Velleman and Aaltje Zomerplaag. Vrouwtje Velleman however passed away on 21 March 1930 and Isaac Witsenhuijsen marrieg again on 31 December 1930 to Leentje Tonninge, daughter of Mozes Tonninge and Rijntje Metz.
From his first marriage four children were born of whom three have died at the very young age of a couple of months. Only Louis stayed alive and survived the Holocaust.
City Archive of Amsterdam, archive card of Isacc Witsenhuijsen and website www.wiewaswie.nl.
Biography