Abraham van Gelder was married to Sibilla Heijmans. He and his wife lived at 22 Boschstraat in Winschoten until their deportation.
Abraham van Gelder enrolled at the Nederlands-Israëlietisch Seminarium in Amsterdam when he was 13 and sat for the first-level teacher's examination four years later. In 1890 he became a teacher at a Jewish religious school in Amsterdam. He was later appointed second …