Esther Hekster was the widow of Levie Witsenhuijsen. The couple had three children. One child wasn't at home when there was a razzia. This child fled to family in Blaricum and survived the war through hiding.
Addition of a visitor of the website
In addition, a Jokos file (number 55674) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.