Willem Sanders was the third son of Sander Sanders and Esther Morpurgo. He was born in Amsterdam on 11 December 1905 and became a tailor by profession. Willem lived at home with his parents until mid 1920 and on 9 August 1920 he left the parental home and took up residence/living space at Celebesstraat 46 III in Amsterdam-Oost, with G. Blom. He then lived at about 6 different addresses in the city until September 1931 when he moved into a house at 1e Boerhaavestraat 9 ground floor in Amsterdam East.
On 1 June 1932, he married 21-year-old Roman Catholic Anna Stoll in Amsterdam, who was born in Bergkamen, Germany, on 4 January 1911. Anna came to Amsterdam from Dortmund on 5 October 1928 to work there as a maid. As a 17-year-old, she stayed with the Broese van Groenou family in the Johannes Vermeerstraat 50 upper house until she moved to the Nicolaas Maesstraat 122-up.hs on 5 October 1929 and to house no. 61.
After the marriage at the 1st of June, Anna moved in with her husband Willem Sanders on 2 June 1932, who then still lived in 1e Boerhaavestraat. They moved in February 1933 to Amazonenstraat 23 in the Stadium Distict of Amsterdam-South and in February 1936 they moved into a house at Eemsstraat 15. On 11 March 1940, the family moved to the Boterdiepstraat 16-2nd floor in the Amsterdam River District.
Willem and Anna had now had two children: Esther Lou, who was born on 8 May 1932, one month before the wedding and was registered as Esther Lou Stoll at Anna's address. Later, her surname was changed to Sanders. And in 1936 Frits Willem was born in the Eemsstraat, where the family lived from February 1936.
Only Willem Sanders had a registration card from the Jewish Council cartothek. Not from his R.C. German woman Anna Stoll and her two children. Willem Sanders survived the war and the entire family emigrated to Sydney, Australia on 11 April 1950.
Sources include the City Archive of Amsterdam, family registration cards of Sander Sanders, Willem Sanders and Anna Stoll; archive cards of Willem Sanders, Anna Stoll and the still not public archive cards of the children Esther Lou and Frits Willem Sanders; Amsterdam residence cards/Johannes Vermeerstraat 50 and Nicolaas Maesstraat 122 with Anna Stol land the file cabinet of the Jewish Council, registration card