Jeanne Gourmont died in 1373 and is buried in the Church of Saint-Croix in Loudun. The titles she brought to Jean de la Jaille on their marriage notably that of Lord of Ranton, passed to her eldest son, Tristan III de la Jaille. Both her two sons, now seasoned knights, fought the English in Poitou and in Brittany. Tristan III led a company in which his brother, Guichard was his lieutenant, and he was lieutenant to his father, the governor of Loudun. In 1371, he had married Eleanor de Maille, daughter of the Lord de Breze. He was part of the Court of Louis I of Anjou, and was killed with him at Bari in 1384, and the title of Lord of Ranton passed to his eldest son, Tristan IV