Marie, Countess of Ponthieu
Marie of Ponthieu was suo jure Countess of Ponthieu and Countess of Montreuil, ruling from 1221 to 1250.Biography
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
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. Simon and Marie had four daughters but only two are recorded. Their elder daughter was Joan of Dammartin, second wife of Ferdinand III of Castile. Their younger daughter was Philippe of Dammartin 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.Ancestry
