Moses Lisak and Esther Kaplan were born in Kalisz, Poland. They arrived in Belgium in January 1939 as a stopover to emigrate to Uruguay. On January 19, 1935, they had a daughter: Ruth. Moses and Lisak were deported on transport XXIII from the Dossin Barracks to Auschwitz-Birkenau. Ruth was not deported and survived the war.