Hartog Polak was a son of Levie Polak and Elisabeth Kuijper. He married Hanna Cutzien from Zwolle on 24 April 1940 in Groningen, a daughter of Benjamin Aron Cutzien and Judik kan. The couple had no children and resided in Arnhem. Hartog's father Levie Polak passed away on 2 October 1937 in Groningen and his mother Elisabeth Kuijper deceased also in Groningen on 29 January 1943. Hartog and Hanna were both killed in Auschwitz on 28 January 1944.
Hartog had a sister Rebekka, married to the teacher Comprecht Cohen and who resided in Den Haag. They too have been killed in Auschwitz.
websites allegroningers.nl/ certificate of marriage nr. 285 of Hartog Polak nr 285 and www.wiewaswie.nl.