Son of King Pedro of Portugal and Teresa Lourenço. Master of Avis from 1364 to1397. Future King of Portugal. For references to events during his reign, see: João I, King of Portugal. Joham meestre d'Avis Chronicle entries in which João, Master of Avis [future João I, King of Portugal] appears: Crónica de D. Fernando, ch. 98: 24Crónica de D. João I, part 1, ch. 125: 4, 9, 20, 36,