Rachel de lange was a daughter of Israel de Lange and Mina Koopman. She married 2 April 1930 in Amsterdam to Nathan Witteboon, son of Meijer Witteboon and Eva Schellevis. Nathan however passed away already on 21 November 1936.
Rachel and Nathan had three children: Eva, who died in childhood, 2 years old (and was buried 31 October 1933 at the Jewish Cemetery in Diemen), Max and Nathan.
City Archive of Amsterdam, archive card of Meijer Witteboon, family registration card of Nathan Witteboon and website www.wiewaswie.nl.