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Peter IV,king of Portugal: see Pedro IPedro I
(Dom Pedro de Alcântara) , 1798–1834, first emperor of Brazil (1822–31); son of John VI of Portugal. Dom Pedro was a child when the Portuguese royal family, fleeing from Napoleon's conquering French army, left Portugal for Brazil.
..... Click the link for more information. , emperor of Brazil.
Peter IV(Peter the Ceremonious), 1319?–1387, king of Aragón and count of Barcelona (1336–87); son and successor of Alfonso IV. He supported Alfonso XIAlfonso XI,
1311–50, Spanish king of Castile and León (1312–50), son and successor of Ferdinand IV. His vigorous campaign against Granada provoked an invasion by the Moors from Morocco; they took Gibraltar in 1333.
..... Click the link for more information. of Castile at the battle of Tarifa (1340), recovered (1343–44) the kingdom of Majorca, and engaged in an indecisive naval war with Genoa and Pisa over possession of Sardinia. Though forced to confirm the privileges granted to the nobles by Alfonso III, Peter later (1348) defeated the troops of the nobles and withdrew their charter. In 1381 he assumed suzerainty over the duchy of Athens. His son, John I, succeeded him.