Jacob Oudker, the youngest son of Hijman Oudkerk and Elisabeth Rokkestikker, was born on 13 April 1917. He lived with his parents at Bilderdijkstraat 71 and was a druggist by profession.
Jacob, usually called Jaap, had given notice of marriage with Lilly Davids, a daughter of Wolf Davids and Karolina Kahn. She was born in Arnhem on 19 June 1919 and at the time she worked as a saleswoman . During h…