Battle of Bouvines
She had many siblings and half-siblings, including Thomas de St. Valéry (died 1219), who was a son of Bernard by his second wife Eleanor de Domnart. Thomas married Adele de Ponthieu, by whom he had a daughter, Annora, who in her turn married Robert III, Count of Dreux, by whom she had issue. Thomas fought on the French side, at the Battle of Bouvines on 27 July 1214.