David van Rhyn was the son of Hartog van Rhyn and Rosaline de Groot. David married in 1921 in Rotterdam to Keetje Berkelouw, daughter of Elias Berkelouw and Hanna de Bok.
Addition of a visitor of the website
In addition, a Jokos file (number 53174) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.