In 1363, thanks to the support of the king of Navarre, he was given the bishopric of Calahorra in the kingdom of Aragon, which he administered until his death in 1373.
The chief cities on its banks are Logrono, Calahorra, Tudela, Saragossa and Caspe.
Older than these divisions, the date of which is uncertain, the ancient limits of the dioceses of Pamplona, Bayonne and Calahorra, probably corresponded more nearly to the boundaries of the ancient tribes, the Autrigones, the Caristi, the Varduli and the Vascones, with their still differing dialects, than do these civil provinces.
He studied at the university of Saragossa, arid, having been ordained priest, became vicar-general to the bishop of Calahorra in 1782.
Ayala died at Calahorra in 1407.