Everhardus Jacobus Wijtvliet was a son of Alida Velleman and the non-Jewish Everhardus Wijtvliet. After the birth of his sister Saartje in May 1920, Everhardus Jacobus was born in Haarlem on 9 November 1921. His mother Alida Velleman however passed away already on 17 October 1924, when Everhardus was hardly 3 years old. And there was also a little girl, his sister Grietje, who died in February 192…