De ouders van Judith Kalf - de Vries waren Daniel de Vries en Kaatje Hartog.
Judith de Vries was in 1935 gescheiden van Lion Kalf. Zij heeft geen kinderen gehad.
These persons are listed as residing at the same address. The source does not provide information about how they were related to one another.
In addition, a Jokos file (number 51653) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.