Gunther Hans Otto Boers was a son of Sally Boers and Edith Herz. He was born in 1925 in Groenlo and killed in Auschwitz on 17 August 1942. His mother was also killed in Auschwitz but his father has survived the Holocaust.
City Archive of Amsterdam, archive cards of Edith Herz and Sally Boers.
In addition, a Jokos file (number 20353) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.