Henry I of France whose death Henry was left to deal with his rebel sibling. In 1032, he placated his brother by giving him the duchy of Burgundy which his father had given him in 1016. In an early strategic move, Henry came to the rescue of his very young nephew-in-law, the newly appointed Duke William of Normandy (who would go on to become William the Conqueror), to suppress a revolt by William's vassals. In 1047, Henry secured the dukedom for William in their decisive victory over the vassals at the Battle of Val-ès-Dunes near Caen; however, Henry would later support the barons against
William the Conqueror of the creators of England's greatness or as inflicting one of the greatest defeats in English history. Others have viewed William as an enemy of the English constitution, or alternatively as its creator. William and his wife Matilda of Flanders had at least nine children. The birth order of the sons is clear, but no source gives the relative order of birth of the daughters. There is no evidence of any illegitimate children born to William. William the Conqueror William I (c. 1028 – 9 September 1087), usually known as William the Conqueror and sometimes William the Bastard, was the