Joël de Lange was a son of Isaac de Lange and Marianne Nathan. He married Jutje Boomstra in 1913 in Groningen. She died in 1918. 459289 and the here mentioned Simon were their children.
Addition of a visitor of the website
In addition, a Jokos file (number 54835) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting …