Matthew I of Montmorency
Matthew I (; died 1160) was lord of Montmorency, Marly, Conflans-Sainte-Honorine and Attichy. He was also Constable of France from 1138 to 1160 under Louis VII. He was the eldest son of Bouchard IV de Montmorency and Agnes de Beaumont-sur-Oise. In 1126 he married Alice FitzRoy (Alix), illegitimate daughter of King Henry I of England, and had the following issue: Alix died before 1141 when her husband married his second wife Adelaide of Maurienne, the widow of Louis VI of France.