Max Heinrich Hermann Reinhardt Nettlau (German: [ˈnɛtlaʊ]; 30 April 1865 – 23 July 1944) was a German anarchist and historian. Although born in (today part of Vienna) and raised in Vienna, he lived there until the anschluss to Nazi Germany in 1938. Max Nettlau retained his Prussian (later German) nationality throughout his life. A student of the Welsh language he spent time in London where he joined the Socialist League and met William Morris. While in London he met anarchists such as Errico Malatesta and Peter Kropotkin whom he remained in contact with for the rest of his life. He also helped to found Freedom Press for whom he wrote for many years.