Richilde, Countess of Hainaut

Richilde
Countess of Mons and Hainaut Margravine of Valenciennes
Richilde, Countess of Mons and Hainaut, Margravine of Valenciennes
Born	c. 1018
Died	(1086-03-15)15 March 1086 Mesen
Spouse(s)	Herman of Mons Baldwin VI, Count of Flanders William FitzOsbern, 1st Earl of Hereford
Father	Reinier of Hasnon
Mother	Adelheid of Egisheim

Richilde, Countess of Mons and Hainaut (c. 1018 – 15 March 1086), was a ruling countess of Hainaut from c. 1050 until 1076, in co-regency with her husband Baldwin VI of Flanders (until 1070) and then her son Baldwin II of Hainaut. She was also countess of Flanders by marriage to Baldwin VI between from 1067 to 1070. She ruled Flanders as regent during the minority of her son Arnulf III in 1070–1071.