Jacob van Gelder, a son of Joseph van Gelder and Jetta Park, was born in Leiden on 23 August 1871. He was a painter and decorater and later a bicycle painter by profession. On his age of 43 year, he married on 23 June 1915 in Rotterdam the 44 year old Mietje van Geldere, a daughter of Salomon van Geldere and Sophia Polak. She was born in Rotterdam on 15 January 1871 and she was a shop keeper. The couple had no children.
Jacob and Mietje lived at Erasmusstraat 67 and 71 in de district “Oude Noorden”, at Nieuwemarkt 19a near the so-called City Triangle (Stadsdriehoek) and at the Oudedijk 206b in de district of Kralingen-Crooswijk. There they resided until the moment they were carried off on 10 April 1943 to Westerbork where they ended up in barrack 72. Ten days lager, on 20 April they both were put on transport to Sobibor and upon arrival there on 23 April 1943 immediately murdered in the gas chambers.
Sources include the City Archive of Rotterdam, family registration cards of Salomon van Gelder (1834) with Mietje van Geldere and the family registration card of Jacob van Gelder; the file cabinet of the Jewish Council, registration cards of Jacob van Gelder and Mietje van Gelder-van Geldere.