Joan, Countess of Ponthieu

Joan of Dammartin was Queen of Castile and León by marriage to Ferdinand III of Castile. She also ruled as Countess of Ponthieu (1251–1279) and Aumale (1237–1279). Her daughter, the English queen Eleanor of Castile, was her successor in Ponthieu. Ferdinand II, Count of Aumale, her son and co-ruler in Aumale, predeceased her, thus she was succeeded by her grandson John I, Count of Aumale.