Background
He was the son of Guy II, constable of Champagne, and Mathilde of Bourbon.
He was the son of Guy II, constable of Champagne, and Mathilde of Bourbon.
Their sons William III and John would continue to confirm and patronzie the nunnery during their lives, including William II"s burial at the Saint-Dizier nunnery in 1231. William and Margaret would found more Cisterian nunneries throughout the county of Flanders, including one at Flines. He had four children (three sons) by Margaret and the eldest took part in the War of the Succession of Flanders and Hainault:
William III, Count of Flanders and Lord of Kortrijk
Guy, Count of Flanders and Margrave of Namur
John I, Lord of Dampierre, Viscount of Troyes, and Constable of Champagne
Joanna, married in 1239 to Hugh III of Rethel, then in 1243 to Theobald II of Bar.