Philippa of Dammartin

Philippe of Dammartin (Philippa de Dammartin) was a 13th-century noblewoman. Philippe was the daughter of Marie, Countess of Ponthieu, and her husband, Simon of Dammartin. She was the sister of Joan, Countess of Ponthieu, wife of Ferdinand III of Castile and mother of Eleanor of Castile, the wife of Edward I of England.