Marie, Countess of Ponthieu

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Marie, Countess of Ponthieu
Marie, Countess of Ponthieu.jpg
Marie, Countess of Ponthieu
Spouse(s) Simon of Dammartin
Mathieu de Montmorency, Seigneur d'Attichy
Joanna of Dammartin
Mathilda of Dammartin
Philippa of Dammartin
Maria of Dammartin
Father William IV of Ponthieu
Mother Alys, Countess of the Vexin
Born (1199-04-17)17 April 1199
Died 21 September 1250

Marie of Ponthieu (17 April 1199[1] – 21 September 1250) was suo jure Countess of Ponthieu and Countess of Montreuil, ruling from 1221 to 1250.


Marie was the daughter of William IV of Ponthieu and Alys, Countess of the Vexin, and granddaughter of King Louis VII of France by his second wife Constance of Castile. As her father's only surviving child, Marie succeeded him, ruling as Countess of Ponthieu and Montreuil from 1221 to 1250.

Marriages and children[edit]

She married Simon of Dammartin before September 1208. He was the son of Alberic II of Dammartin and Maud de Clermont, daughter of Renaud de Clermont, Count de Clermont-en-Beauvaisis and Clemence de Bar.[2] Simon and Marie had four daughters but only two are recorded. The eldest was Joan of Dammartin (1220- 16 March 1279), second wife of Ferdinand III of Castile. The other daughter was Philippa of Dammartin (died 1277/81) who married firstly Raoul II d' Issoudun, secondly Raoul II de Coucy, and thirdly Otto II, Count Geldern.

Marie married secondly sometime between September 1240 and 15 December 1241, Mathieu de Montmorency, Seigneur d'Attichy, who was killed in battle at Mansurrah on 8 February 1250 during the Seventh Crusade, led by King Louis IX of France.[3]



  1. ^ The Complete Peerage
  2. ^ Comtes de Clermont[dead link]
  3. ^ Charles Cawley,Medieval Lands, Comtes of Ponthieu
  1. The Complete Peerage
Preceded by
William IV
Countess of Ponthieu
Succeeded by