Izak van Gelder Mozes Heiman Gans, Memorboek. Platenatlas van het leven der joden in Nederland van de middeleeuwen tot 1940 (6e bijgewerkte druk; Baarn 1988) 802
Izak van Gelder enrolled in the Nederlands Israëlitisch Seminarium [Dutch-Jewish Seminary] in Amsterdam at age 13. He lacked the financial resources to complete his studies. The Jewish community in The Hague offered him a teaching position. He continued studying on his own and passed the rabbinical …