Question: What is the date of death of John Of Aragon (Patriarch)'s mother?
Sentence (from "Alfonso I, Duke of Gandia"): He held the titles of Duke of Gandia (from 1399), Count of Denia (since 1355), Count of Ribagorza (from 1361), Marquis of Villena (since 1366), and first Constable of Castile.
Relevant evidence: No