Louis de Lange, a son of Salomon de Lange and Flora Root, married 21 August 1923 in Amsterdam to Elisabeth de Vries, a daughter of Isaac de Vries and Flora Onderwijzer.
Louis had a sister Betsie who was married to his brother-in-law Adolf de Vries.
website www.wiewaswie.nl .
In addition, a Jokos file (number 13744) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.