Max Heinrich Hermann Reinhardt Nettlau (German: [ˈnɛtlaʊ]; 1865–1944) was a German anarchist and historian.

His extensive collection or archives was sold to the International Institute of Social History in Amsterdam in 1935.

[1] He lived continuously in Amsterdam from 1938 where he worked on cataloging the archive for the Institute.

He died there suddenly from stomach cancer in 1944, without ever being harassed.

[2]