Background
He was the son of Baldwin IV, Count of Hainaut.
He was the son of Baldwin IV, Count of Hainaut.
Namur was acquired from his mother Alice of Namur. He was described as "The Count Baldwin with eyes of blue."
With Margaret, Baldwin had the following issue:
Isabelle of Hainaut (Valenciennes, April 1170 – 15 March 1190, Paris), married king Philip II of France
Baldwin VI of Hainaut (1171–1205), also count of Flanders and Latin Emperor
Yolanda of Flanders (1175–1219), married Peter II of Courtenay, Latin Emperor
Philip I, Marquis of Namur (1175–1212)
Henry of Flanders (1176–1216), Latin Emperor
Sybille of Hainault (1179 – 9 January 1217), married c. 1197 Guichard IV, Sire de Beaujeu (d 1216)
Eustace of Hainault (d 1219), regent of the Kingdom of Thessalonica
Godfrey of Hainault.