John, Duke of Randazzo
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Giovanni d'Aragona (died 1348), infante, duke of Randazzo, Athens, and Neopatria, and regent of Sicily (1342-1348), was the fourth son of Frederick II (III) of Sicily and the most powerful nobleman in Sicily during the reigns of his brother Peter and his nephew Louis, in whose minority he was regent.
He kept the peace during regency, though he supported the Catalan party over the local Italian nobility. Thus he appointed to succeeded him Blasco II de Alagona, a Catalan. War broke out upon his death during the Plague.
He was buried next to his father and nephew in the cathedral of Catania.