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http://en.wikipedia.org/wiki/Adelaide_of_Aquitaine

Adele or Adelaide of Aquitaine was the daughter of William III, Duke of Aquitaine and Adele of Normandy, daughter of Rollo, Duke of Normandy.
Her father used her as security for a truce with Hugh Capet, whom she married in 970. In 987, after the death of Louis V, the last Carolingian king of France, Hugh was elected the new king with Adelaide as queen. They were proclaimed at Noyon and blessed at Reims. They were the founders of the Capetian dynasty of France.
Their children were:
▪ Hedwig, Countess of Mons , wife of Reginar IV, Count of Mons
▪ Robert II , the future king of France. Crowned co-king 987 in order to consolidate the new dynasty
▪ Gisèle, Countess of Ponthieu, wife of Hugh I, Count of Ponthieu
▪ Adela, , wife of Renauld I, Count of Nevers