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Birth:          ABT 1180 of Dammartin, Seine-et-Marne, France
Death:          21 Sep 1239 Abbeville, Somme, France
Burial:         Valoires, France

Notes
https://en.wikipedia.org/wiki/Simon,_Count_of_Ponthieu
Simon of Dammartin (1180 – 21 September 1239) was a son of Alberic II of Dammartin 
(Aubry de Dammartin) and his wife Mathildis of Clermont.

Biography[edit]

Simon was the brother of Renaud I, Count of Dammartin, who had abducted the 
heiress of Boulogne, and forced her to marry him. It is thought that in order to 
strengthen the alliance with the Dammartins, King Philip Augustus of France allowed 
Simon to marry Marie, Countess of Ponthieu, who was a niece of the king, in 1208. 
Renaud and Simon of Dammartin would eventually ally themselves with John, King of 
England. In 1214 the brothers stood against Philip Augustus in the Battle of Bouvines. 
The French won the battle, and Renaud was imprisoned, while Simon was exiled.

Marie's father William IV, Count of Ponthieu had remained loyal to Philip Augustus. 
When William died in 1221, Philip Augustus denied Marie her inheritance and gave 
Ponthieu in custody to his cousin Robert III, Count of Dreux. After the death of Philip 
Augustus, Marie was able to negotiate an agreement with his successor Louis VIII in 
1225. Ponthieu was held by the king, and Simon would only be allowed to enter this or 
any other fief if he obtained royal permission. In 1231 Simon agreed to the terms and 
added that he would not enter into marriage negotiations for his daughters without 
consent of the king.[1]

Family[edit]

Simon married Marie, Countess of Ponthieu,[2] the daughter of William IV, Count of 
Ponthieu and Alys, Countess of the Vexin. Marie became Countess of Ponthieu in 
1221.[3]

Simon and his wife Marie had four daughters:[4]
Joan, Countess of Ponthieu (1220–1278), married 1) Ferdinand III of Castile. Mother of 
Eleanor of Castile, the wife of Edward I of England. Married 2) Jean de Nesle, 
Seigneur de Falvy et de La Hérelle.
Mathilda of Dammartin (-1279), married John of Châtellerault
Philippe of Dammartin (-1280), married 1) Raoul II of Lusignan, 2) Raoul II, Lord of 
Coucy, 3) Otto II, Count of Guelders.
Maria of Dammartin, married John II, Count of Roucy.

Parents
DE DAMMARTIN Alberic (Aubrey) III (ABT 1135 - 19 Sep 1200)
DE PONTHIEU Mathilda (Maud) (Mahaut) (ABT 1141 - AFT Oct 1200)

Siblings
DE DAMMARTIN Juliane (ABT 1172 - 1238)
DE DAMMARTIN Agnes (ABT 1177 - )
DE DAMMARTIN Simon II (ABT 1180 - 21 Sep 1239)

Marriage To OF PONTHIEU Marie (Jeanne) (17 Apr 1199 - 21 Sep 1250)
    m. BEF Sep 1208 her 1st

Notes

Parents
TALVAS William (Guillaume) III (1179 - 4 Oct 1221)
OF FRANCE Alice (Alix) (4 Oct 1160 - 1221)

Children by OF PONTHIEU Marie (Jeanne) 17 Apr 1199 - 21 Sep 1250
DE DAMMARTIN Joan (ABT 1220 - 16 Mar 1279)

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