Jaantje Droomer was a daughter of Nathan Droomer and Mietje van Leeuwen. She married Ruben de Koning in 1891 in Rotterdam. They had at least eight children, among whom Sientje.
Addition of a visitor of the website
In addition, a Jokos file (number 61432) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
Person is in the National Database of Victims of Persecution