Guillaume "William" II De Dampierre
- Born: 1196, Dampierre, France
- Marriage: Marguerite Comtesse De Flandre in 1223 in France
- Died: 3 Sep 1231, Dampierre, France aged 35
Noted events in his life were:
• Lord of Dampierre: Lord of Dampierre, 1216, Dampierre, Aube, Champagne, France.
William married Marguerite Comtesse De Flandre, daughter of Baudouin Flanders Haina and Marie De Champagne, in 1223 in France. (Marguerite Comtesse De Flandre was born on 2 Jun 1202 in Valenciennes, Nord-Pas-de-Calais, France and died on 10 Feb 1280 in Valenciennes, Nord-Pas-de-Calais, France.)