Machiël Koster was the son of Izaak Koster and Judit (Jetta) van Engers. He married Duifje Ossendrijver on 19 August 1896. She was the daughter of Eliazar Ossendrijver and Engeltje Poons. The couple had four children, among whom Engeltje.
Addition of a visitor of the website
In addition, a Jokos file (number 5296) on this household is at the Amsterdam Municipal Archive. Access is subject to autho…