Gompert van de Kar was a son of David van de Kar and Heintje Schraal, who both have passed away already before the war. He married 21 April 1909 in Amsterdam to Rachel Tas, a daughter of Levie Tas and Saartje Hartog Peper. The couple had two children: Hendrika and Sara, who is mentioned here.
Gompert was born in a family with eleven children, of whom two have died before the war. However his sibli…