Amadeus VIII of Savoy

Amadeus VIII (4 September 1383 – 7 January 1451), nicknamed the Peaceful, was Count of Savoy from 1391 to 1416 and Duke of Savoy from 1416 to 1440. He was the first to hold the ducal title, granted by Emperor Sigismund. Known for his diplomatic temperament and administrative reforms, he strengthened the state's institutions and fostered internal peace.

He also claimed the papacy from 1439 to 1449 as Antipope Felix V, in opposition to Popes Eugene IV and Nicholas V, becoming the last historical antipope recognised by a significant portion of the Catholic clergy.

Awards: Grand Master of the Order of the Most Holy Annunciation

Source: Wikipedia — https://en.wikipedia.org/wiki/Amadeus_VIII_of_Savoy