Amadeus VIII of Savoy (b. 1383)
Amadeus VIII (4 September 1383 – 7 January 1451) was a Savoyard nobleman, the son of Amadeus VII, Count of Savoy and Bonne of Berry. He was nicknamed the Peaceful. After the death of his father in 1391, his mother acted as a regent, because of his youth. He was a claimant to the papacy from 1439 to 1449 as Felix V in opposition to Popes Eugene IV and Nicholas V, and is considered the last historical antipope.