Matthieu I of Montmorency

Matthieu I 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,[1] 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.[2] 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. Herve de Montmorency, abbot of Saint-Martin de Montmorency, then deacon of the Church and dean of Paris before his death in 1192.
  5. Matthieu de Montmorency (d. Constantinople 1204), he inherited the lordship from his brother Theobald.

Alix died before 1141 when her husband married his second wife Adelaide of Maurienne, the widow of Louis VI of France.[3]


  1. L'epousa de Simon de Montfort, et la croisade albigeoise, Monique Zerner, Femmes, mariages, lignages – XIIe-XIVe siècles: Mélanges offerts à Georges Duby, ed. Georges Duby,(De Boeck-Wesmael, 1992), 449 note1.
  2. L'epousa de Simon de Montfort, et la croisade albigeoise, Monique Zerner, 449.
  3. Adelaide of Savoy, John Bell Henneman, Jr.,Medieval France: An Encyclopedia, ed. William W. Kibler and Grover A. Zinn, (Routledge, 1995), 7.
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