John I, called by posterity the Hunter or the Lover of Elegance, or the Abandoned in his lifetime, was the King of Aragon from 1387 until his death.
Tomb effigy
Image: Signatura joan i
Peter IV, called the Ceremonious, was from 1336 until his death the king of Aragon, Sardinia-Corsica, and Valencia, and count of Barcelona. In 1344, he deposed James III of Majorca and made himself King of Majorca.
Peter IV, King of Aragon by Gonzalo Pérez & Jaume Mateu (1427)
A Sardinian ducat (or principat), also called an Alfonsino, of Peter IV's reign. Note the four bars representing the Crown of Aragon.
Coat of arms of Peter IV at the Royal Gate of Poblet Monastery