[1] His brother, Renaud I, Count of Dammartin, who had abducted the heiress of Boulogne, and forced her to marry him.
[3] Simon's father-in-law, William IV, Count of Ponthieu had remained loyal to Philip Augustus.
[3] When William died in 1221, Philip Augustus denied Simon's wife's inheritance and gave Ponthieu in custody to his cousin Robert III, Count of Dreux.
[3] Following Philip Augustus's death in 1225, Marie managed to broker a deal with his heir Louis VIII.
[3] Simon accepted the terms in 1231 and added that he would not negotiate his daughters' marriages without the king's approval.