Leopold III, Duke of Austria

Leopold III (1 November 1351 – 9 July 1386), known as the Just, a member of the House of Habsburg, was duke of Austria from 1365. As head and progenitor of the Leopoldian line, he ruled over the Inner Austrian duchies of Carinthia, Styria and Carniola as well as the County of Tyrol and Further Austria from 1379 until his death.

Source: Wikipedia — https://en.wikipedia.org/wiki/Leopold_III,_Duke_of_Austria