Judith Koopman was a daughter of Levie Koopman and Rachel Zak. She married 18 November 1936 in Amsterdam to Nathan Hoepelman, a son of Jacob Hoepelman and Rachel Cohen. In 1937 their daughter Rachel was born.
City Archive of Amsterdam, archive card of Judith Koopman and Nathan Hoepelman .
In addition, a Jokos file (number 20764) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.