Baldwin VIII (1150-1195)was also Count of Hainaut,Marquis de Namur and lord of Beaumont.He was the son of Baudouin IV of Hainaut and Alix de Namur ,he married Margaret I, Countess of Flanders .
Baldwin VIII and Margaret I of Flanders
Their eldest daughter Isabelle de Hainault, married Philip II of France whilst another daughter Yolande de Hainaut became Latin Empress upon her marriage to Pierre II de Courtenay in 1193.