Peter V of Aragon (IV of Barcelona) (1429-1466), Constable of Portugal and Grand Master of the Order of Aviz, son of Pedro, Duke of Coimbra and grandson of King John I of Portugal, was, between 1463–1466, King of Aragon and Count of Barcelona, during the War against John II of the Trastámara dynasty. Note that Peter V did not reign in Valencia, which remained under the control of John II.
