Matthieu I of Montmorency

Matthew I (French: Mathieu de Montmorency; 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, 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.

...
Wikipedia