Jacob de Lange was married to Elisabeth de Lange. The couple had two sons, David Mozes and Mozes David. The family lived along the Achterweg in Raalte. In August 1942 Jacob de Lange was interned at the Jewish labour camp Wittebrink near Hummelo. On 2 October 1942 he was transferred to Camp Westerbork via Arnhem. His wife and their two sons were taken to Westerbork that same day. From there the four family members were deported to Auschwitz.
H. Hamburger and J.C. Regtien, Joodse oorlogsmonumenten in de provincie Overijssel, alsmede algemene oorlogsmonumenten waarop joodse namen voorkomen. Profiel (Bedum 2002) 55
In addition, a Jokos file (number 30889) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
This family is commemorated on a memorial in Raalte. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.