Background
He was son of Baldwin II, Count of Hainaut and Ida of Louvain.
He was son of Baldwin II, Count of Hainaut and Ida of Louvain.
Baldwin succeeded to the county of Hainaut in 1102. Baldwin married Yolande of Guelders at a young age. He had been betrothed to Adelaide of Maurienne, a niece of Countess Clemence of Flanders.
The pope declared that the marriage was legal and could not be dissolved.
Baldwin died at a young age of c. 33 in 1120, and was buried in Mons, Belgium. Their children were:
Baldwin IV, Count of Hainaut, married Alix (Adelaide) de Namur.
Gerhard of Hainaut, ancestor of the Counts of Dale. Gertrude/Ida of Hainaut, married before 9 August 1138 to Roger of Tosny of Conches and Flamsted.
Richildis of Hainaut, married: 1) Thierry d"Avesnes.
2) Everard, Castellan of Tournai. After Baldwin"s death, Countess Yolande married Godfrey II, Lord of Ribemont and Bouchain, Castellan of Valenciennes and the son of Anselm of Ribemont in ca 1120. Yolande and Godfrey II had two children:
Godfrey III, Castellan of Valenciennes
Berthe of Valenciennes, who married 1) Count Otto of Duras and 2) Guy de Saint-Aubert.