 He also served as chancellor to the Duke of Anjou and Duke of Alençon, and advisor to Henry II of France, Charles IX of France, and Henry III of France.De Thou was a member of a respected family from Champagne.He was son of Augustin de Thou (d. 1544) and Claude de Thou (d 1523), also Président of the Parlement de Paris, and brother to Nicolas de Thou, the Bishop of Chartres.