Amadeus III (French: Amédée III, 29 March 1311[1] – 18 January 1367) was the Count of Geneva from 1320 until his death. He ruled the Genevois, but not the city of Geneva proper, and it was during his time that the term "Genevois" came to be used as it is today. He was the eldest son and successor of William III and Agnes, daughter of Amadeus V of Savoy.[2] He played a major rôle in the politics of the House of Savoy, serving consecutively as regent and president of the council, and also sitting on the feudal tribunal—one of three tribunals of the Audiences générales—of the Duchy of Aosta.