Amadeus IX, Duke of Savoy was a 15th-century aristocrat who ruled the Duchy of Savoy from 1465 until his death in 1472. Born in Thonon, he was the son of Duke Louis and Anne de Lusignan. Although he held the title of Duke, his epilepsy and subsequent retirement meant that his wife, Yolande of Valois, managed much of the state's affairs. He was widely recognized for his gentle character, his devotion to the Catholic Church, and his significant support for the poor and religious orders.