(Munébrega, Zaragoza, España, c. 1310 - Aviñon, Francia, 1396)
"Juan Fernández de Heredia (Munébrega, Zaragoza, c. 1310 - 1396) en aragonés Johan Ferrández d'Heredia, fue un escritor, mecenas, político y diplomático español al servicio de Pedro IV de Aragón y gran maestre de la Orden de San Juan de Jerusalén."
"Juan Fernández de Heredia (in Aragonese Johan Ferrández d'Heredia, pronounced IPA: [ˈtʃwan feˈrand̪eθ deˈɾedʝa] (c. 1310 - 1396) was the Grand Master of the Knights Hospitaller from 24 September 1377 to his death. His tenure was occupied by the "affair of Achaea." He was also a great patron of the translation and composition of historiographical works in the Aragonese language and a counsellor to two Kings of Aragon."