Klaus Gottfried Albert Deen

Klaus Gottfried Albert Deen (standing, 3rd from the left) at a birthday party of Hans Hamburger (now: Hans Hager, who donated the picture). On the left Klaus'foster sister Gerda Nothmann (who survived the war). In the front Hans Hamburger, in the white blouse.
Source: Photo from project In Memoriam (Guus Luijters en Aline Pennewaard)