Who married Marie de Ponthieu?

Marie de Ponthieu (av. 1199-1250) est comtesse de Ponthieu suo jure de 1221 à 1250. Elle est la fille de Guillaume II, comte de Ponthieu, et d'Adèle de France, fille du roi Louis VII.

Simon of Dammartin (1180 – 21 September 1239) was count of Ponthieu. In 1214 he fought against Philip Augustus at the battle of Bouvines. With the Capetian victory at Bouvines, he was exiled. Through negotiations of his wife Marie, he was allowed back in Ponthieu and agreed to not allow his daughters to marry without royal consent.