Hartog van Cleef was a son of Barend van Cleef and Sophia Johanna van Geldere. He was born on 13 December 1919 in Amsterdam, was not married and worked as a warehouse clerk. He lived at home with his parents, who lived in the Vrolikstraat, from 1928 at number 299 and from 1936 at number 94. Hartog had two sisters, Rozet and Sientje and another little brother Saul. His sister Sientje died at the ag…