Thibaud archbishop of Canterbury, of whose family nothing is known, was first made abbot of Bec after the year 1136, and soon after was called to England, where we find him raised to the see of Canterbury in 1139. Under the influence of Thomas a Becket, Thibaud espoused the cause of the pope in the quarrels with the king of England, and was therefore treated by the latter as a public enemy. He escaped to St. Omer, but was afterwards imprisoned by Eustachius for refusing to crown the son of the latter. Some time after 1153 he was restored to his diocese by the duke of Normandy, and died April 18, 1161, leaving a number of Letters. See Hook, Lives of the Archbishops of Canterbury, s.v.