User:Kansas Bear/John-William of Beaumont

Jean-Guillaume of Beaumont (d. 1257), son of Adam II of Beaumont-Gâtinais, lord of Beaumont-du-Gâtinais, and Isabelle of Mauvoisin, was Marshal of France in June 1250.

Jean-Guillaume participated in the seventh crusade to Egypt in 1248. After the failure of the crusade in 1250, he accompanies King Louis IX to Acre, where he was employed in the office of a marshal of the king. At the royal council he is one of those who advocate for the king's retention in the Holy Land as long as the Crusaders find themselves prisoners in Egypt. He thus entered into a conflict with his uncle Jean of Beaumont, who pleaded for a speedy return of Louis to France, and treated Jean-Guillaume as a "coarse boor" before the assembly of courtiers. Finally Guillaume saw his adopted position since the presence of the king in the East was extended until 1254.