Simon II de Dammartin , Count of Aumale
Simon II de was born about 1172 in Dammartin, Seine-et-Marne, Ile-de-France, France.  He died on September 21st, 1239 in Abbeville, Somme, Picardy, France.  He was buried in Valoires, France.

 Marie Countess of Ponthieu
Marie Countess of was born on April 17th, 1199 in Aumale, Seine-Inferieure, Normandy, France.  She died at the age of 51 in September 1250 in Normandy, France.

 Joan de Dammartin , of Ponthieu
Joan de was born in 1216 in Dammartin, Seine-et-Marne, Ile-de-France, France.  She died in Abbeville, France.

 Philippa de Dammartin
Philippa de was born about 1224 in Aumale, Seine-Inferieure, Normandy, France.  She died in 1271 in Zutphen, Guelders/Gelderland, Netherlands.