Judith de Boer was a daughter of Hartog de Boer and Mietje Bosboom. She married Jonas Hoogetooren in 1935 in Amsterdam. Her brother was Abraham who also was killed during the Holocaust.
City Archive of Amsterdam, archive card of Hartog de Boer and Judith de Boer .
In addition, a Jokos file (number 50197) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.