Two brothers and two sisters lived in the house at Kerkstraat B66 in Muntendam, all four unmarried and all four children of Jonas Filippus Valk and Jetta Levitus. Jonas died in 1928 but Jetta already died in 1905. They had a total of six children, two of whom survived the Holocaust: Jakob died in 1956 in The Hague and Hartoch in 1982 in Haren.
Filippus was the eldest of the other four children, wh…