Hersent married Count Regnier I 'Longneck' de Hainault OF HENNEGAU in 875. Regnier (son of Count Giselbert of Maasgau OF MOSELLE and Ermengarde Moselle Carolingia OF LORRAINE) was born between 850 and 860 in Hainault, Flanders, Belgium (France); died on 25 Jan 915. [Group Sheet]