Israël van der Sluis was a son of Jacob van der Sluis and Juutje Overweg. He was born on 25 August 1885 in Zwartsluis and had four other brothers, namely Salomon, Simon, Maurits and Hartog Levie. Only Salomon and Hartog Levie have survived the Holocaust, all others were killed during the Shoah.
Israël van der Sluis married on 31 May 1922 in Den Haag Betje Cohen, a daughter of Samuel Cohen and Est…