Felix Ludwig Julius Dahn (9 February 1834 – 3 January 1912) was a German law professor and nationalist author, poet and historian.

[1] Dahn's writings were influential in the conception of the European Migration Period (Völkerwanderung ) in German historiography of the late 19th and early 20th centuries.

His multi-volume Prehistory of the Germanic and Roman Peoples, a chronology of the Migration Period that first appeared in print in 1883, was so definitive that abbreviated versions were reprinted until the late 1970s.

His nationalist historical novels were widely received, and according to Houdsen (1997) were influential in the formation of the völkisch ideology that formed the "Germany's pre-Hitlerian intellectual background for National Socialism".

His Mette von Marienburg portrays bands of "Masures and Poles" hiding in the "Podolian forest".