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Female Joan de Dammartin , of Ponthieu Click to view Joan de Dammartin , of Ponthieu in the family tree

Joan de was born in 1216 in Dammartin, Seine-et-Marne, Ile-de-France, France.  Joan de's father was Simon II de Dammartin , Count of Aumale and her mother was Marie Countess of Ponthieu.  Her paternal grandparents were Alberic II Comte de Dammartin and Maud (Mathilde) of Clermont; her maternal grandparents were William (Guillaume) III Count of Ponthieu and Alix Princess of France , Countess of Vexin. She had a sister named Philippa de.  She was the older of the two children.  She died in Abbeville, France.

Joan de's family with Ferdinand III "The Saint" King of Leon & Castile

‌Joan de and Ferdinand III "The Saint" King of Leon & were married in a religious ceremony in 1237 in Burgos, Spain.  They had a daughter named Eleanor Princess of.

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