Maud Fiennes, daughter of Ingelram (Enguerrand) de Fiennes, Seigneur de Fiennes in Guisnes, by the daughter of Jacques, Seigneur de Conte, Bailleul, and Moriammez in Hainault, and granddaughter of William de Fiennes, by Agnes de Dammartin, daughter of Alberic, Count of Dammartin. Simon de Dammartin, Count of Aumale, by his wife Marie, Countess of Ponthieu and Aumale, was father of Jeanne, Countess of Ponthieu and Aumale, who married King Ferdinand III. of Castile. Maud died before her husband and was buried at Walden.