Führer, Fuehrer or Fuerher (COMIC: Timebenders) was a title used by Adolf Hitler, leader of Nazi Germany. He was commonly referred to as "the Führer". (TV: Let's Kill Hitler, Lost in Time, Silver Nemesis)
On Azimuth, Kurt Schalk declared himself Führer of the Daleks. (AUDIO: Daleks Among Us)
Parallel universes
In the Germania codenamed beta alpha one five by the Council of Hitlers, Adolf Hitler was murdered cicra 1933 by Ernst Rohm, who took his place as Führer. After the formation of the Greater German Reich, Germania I avenged Hitler's death by executing Rohm and his followers and appointing another Hitler in place as Führer.
In 1964, August Hitler, the son of the Hitler of Germania I, assassinated the surviving members of the Council of Hitlers and became the Führer of the Greater German Reich. (PROSE: Warlords of Utopia)