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Male William De Montague Click to view William De Montague in the family tree

William was born in 1300 in Cassington, Oxfordshire, England.  William's father was William De Montague and his mother was Elizabeth De Montfort.  His paternal grandparents were Simon De Montague and Aufrica Princess Of The Isle Of Man; his maternal grandparents were Piers De Montfort and Mathilda De La Mare. He had three brothers and six sisters, named Edward, John, Simon, Alice, Hawise, Isabel, Katherine, Mary and Maud. He had a half-sister named Maud.  He died in Windsor Castle, Berkshire, England.  He was buried in White Friars, London, England.


William's first family with Catherine De Grandison

They had four sons and three daughters, named John, Phillipe, Robert, William, Anneys, Elizabeth and Sibyl.


William's second family with Joan Plantagenet Countess Of Kent


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