Matthew 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.^[1]

He was the eldest son of Bouchard IV de Montmorency and Agnes de Beaumont-sur-Oise.^[2]

In 1126 he married Alice FitzRoy (Alix), illegitimate daughter of King Henry I of England,^[3] and had the following issue:

1. Henri, died young before 1160
2. Bouchard V de Montmorency, (d. 1189 in Jerusalem), who married in 1173 Laurette of Hainaut (d. 9 August 1181), daughter of Count Baldwin IV of Hainaut.^[3] They had a son Matthieu II de Montmorency, nicknamed the Great.
3. Theobald de Montmorency, seigneur de Marly, he went on crusade in 1173. He died as a Cistercian monk sometime after 1189.^[4]
4. Herve de Montmorency, abbot of Saint-Martin de Montmorency, then deacon of the Church and dean of Paris before his death in 1192.^[4]
5. Matthieu de Montmorency (d. Constantinople 1204),^[5] he inherited the lordship from his brother Theobald; father of Bouchard de Marly.

Alix died before 1141. Matthew then married Adelaide of Maurienne, the widow of Louis VI of France.^[6]