Amaury III of Montfort (died 1137), seigneur de Montfort and comte d'Évreux
Simon the younger died that year, reportedly of a tertian fever, while Guy managed to appeal to the pope (with the aid of his father-in-law), resulting in his return to the church.
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In 1275, after the death of his mother at Montargis Abbey, Amaury, by then a Papal Chaplain, accompanied his younger sister Eleanor de Montfort on a winter sea voyage to Wales and her new husband, Llywelyn ap Gruffydd (the grandson of Llywelyn Fawr).
Raymond VII had moved an army against Castelnou d'Arry early in 1220 but was forced to lift his siege to deal with an offensive of Amaury de Montfort.
In 1260 he married Beatrice de Montfort, Countess of Montfort-l'Amaury daughter of Jean I de Montfort and Jeanne, Dame de Chateaudun, and granddaughter of Amaury de Montfort.
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