High Quality Content by WIKIPEDIA articles! Adela of Normandy also known as Adela of Blois and Adela of England (c. 1062 or 1067 – 8 March 1137?) was, by marriage, Countess of Blois, Chartres, and Meaux. She was a daughter of William the Conqueror and Matilda of Flanders. She was also the mother of Stephen, King of England and Henry of Blois, Bishop of Winchester.