Hijman Granaat studied medicine in Amsterdam, where he sat for his medical finals on 22 October 1941. He worked for the Nederlands-Israëlitisch Ziekenhuis [Dutch-Jewish hospital] in Amsterdam. Hijman Granaat was married to Henriette van Gelder.
J.H. Coppenhagen, Anafiem Gedoe‘iem. Overleden joodse artsen uit Nederland 1940-1945 (Rotterdam 2000) 96