The Annales Hanoniæ record the death in 961 of "Adela comitissa Montensis…uxor Ragineri comitis", although as this passage follows closely on those dealing with the exploits of "Raginerus Longi-colli" it is unclear to which Count Reginar the Annales are referring at this point. The primary source which confirms her parentage has not yet been identified. 1
Marriage Information:
Adela married Cte Régnier III DE HAINAUT, son of Cte Reginar II DE HAINAUT and Unknown [DE HUY]. (Régnier III DE HAINAUT was born about 920 and died in 973.)
Sources
1 Foundation for Medieval Genealogy, Medlands: Adela.