Rudolph Eliazar Niekerk and Flora Niekerk had two children: Roosje Louise and Jacob David. Roosje was married to Joël Wolf. The couple lived in Musselkanaal. Jacob had died at a young age.
Addition of a visitor of the website
In addition, a Jokos file (number 6123) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.