Simon II De Dammartin
Simon II was born in 1180 in Dammartin, Seine-et-Marne, France.  He died at the age of 59 on September 21st, 1239 in Abbeville, Somme, France.

 Marie De Ponthieu
Marie was born on April 17th, 1199 in Aumale, Normandy, France.  She died at the age of 51 in 1250 in Normandy, France.

 Philippa De Dammartin
Philippa was born about 1214 in Aumale, Seine-Maritime, France.  She died on April 14th, 1277 in Zutpehn, Gelderland, Netherlands.

 Jeanne De Dammartin
Jeanne was born in 1216 in Dammartin, Seine-et-Marne, France.  She died at the age of 63 on March 16th, 1279 in Abbeville, Somme, France.

 Agathe De Dammartin
Agathe was born about 1218.

 Marie De Dammartin
Marie was born about 1220.