Sumatraplantsoen 80 h, Amsterdam Previous house Next house Residents in February 1941 Leon van Gelder 1882 - 1942 Mathilda van Gelder-Blog 1894 - 1942 Simon van Gelder 1919 - 1944 Child of Leon van Gelder and his family date unknown Child of Leon van Gelder and his family date unknown Clara van Gelder 1933 - 1942 Henriette Zwarenstein-van Gelder 1917 - 1942