Matthew I of Montmorency

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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.

In 1126 he married Alice FitzRoy (Alix), illegitimate daughter of King Henry I of England,[2] 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),[3] he inherited the lordship from his brother Theobald; father of Bouchard de Marly.

Alix died before 1141 when her husband married his second wife Adelaide of Maurienne, the widow of Louis VI of France.[4]


  1. ^ Crouch 1986, p. 64.
  2. ^ a b Zerner 1992, p. 449.
  3. ^ Lippiatt 2017, p. xvii.
  4. ^ Henneman, Jr. 1995, p. 7.


  • Crouch, David (1986). The Beaumont Twins: The Roots and Branches of Power in the Twelfth Century. Cambridge University Press.
  • Lippiatt, G. E. M. (2017). Simon V of Montfort and Baronial Government, 1195-1218. Oxford University Press.
  • Henneman, Jr., John Bell (1995). "Adelaide of Savoy". In Kibler, William W.; Zinn, Grover A. (eds.). Medieval France: An Encyclopedia. Routledge.
  • Zerner, Monique (1992). "L'epousa de Simon de Montfort, et la croisade albigeoise". In Duby, Georges (ed.). Femmes, mariages, lignages – XIIe-XIVe siècles: Mélanges offerts à Georges Duby (in French). De Boeck-Wesmael.