Blekerstraat 24 a, Groningen Previous house Next house Residents in June 1941 Sallie Knorringa 1888 - 1944 Jenetta Knorringa-Baruch 1900 - 1942 Martin Isidoor Knorringa 1927 - 2015 Anna Froukje Knorringa 1922 - 1942 Residents Adolf Nathan Cohen 1868 - 1942 Albert Leopold de Haas 1906 - 1942