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Male Guillaume I. Montagu, de Click to view Guillaume I. Montagu, de in the family tree View timeline for this person's branch of the family tree

Guillaume I. was born in 1222.  Guillaume I.'s father was Eudes I. Montagu, de and his mother was Elizabeth Courtenay, de.  His paternal grandparents were Alexandre Bourgogne, de and Beatrix Rion, de; his maternal grandparents were Pierre II. Courtenay, de and Yolande Namur, de. He had four brothers and four sisters, named Alexandre II., Philippe, Gaucher, Eudes, Montagu, de, Montagu, de, Montagu, de and Marguerite.  He was the second oldest of the nine children.  He died at the age of 78 in 1300.

Family Details of Guillaume I.'s family with Jacquette Sombernon, de

Family Details of Guillaume I.'s family with Marie Barres, des