Jacques Barentz was as the only son of Elkan Barentz and Jetje van Thijn born 14 June 1918 in Amsterdam. He was unmarried and lived at home with his parents, who moved at some point in the thirties from the Mesdaglaan 30 to Oude Amersfoortseweg 13 in Hilversum. Presumably Jacques and his parents have lived there till 1941/1942, till they were ordered by the German authorities to move to Amsterdam where they ended up at Rijnstraat 185.
Jacques and his parents were taken from there to Westerbork, where they were registered 8 November 1942. Two days later, on 10 November they were deported to Auschwitz.
The transport stopped at Kozel, about 80 km west from Auschwitz, were Jacques Barentz and another 179 men were forced to leave the train. They were employed as forced labourers in the surrounding satellite camps of Auschwitz. Jacques’s parents were transported further to Auschwitz and on arrival there on 13 November 1942 they were immediately killed.
From Polish documents of 1946 regarding mass graves near and around the former workcamp Blechhammer, which were found in 2016, it has appeared that Jacques Barentz might have died there on 21 August 1943, presumably due to exhaustion, illness or other hardships. However, his official date of death has been established by the Dutch authorities as on 31March 1944 in Mid Europe.
Sources: City Archive of Amsterdam, family registration card of Elkan Barentz; the file cabinet of the Jewish Council, registration card of Jacques Barentz; Edward Haduch, Panstwowe Muzeum, Auschwitz-Birkenau, protocol 6 maart 1946 and the Wikipedia list of Jew transports from the Netherlands.