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
Frederick, Duke of Lower Lorraine His second wife (1055) was Ida (died 1102), daughter of Bernard II, Duke of Saxony, who remarried with Albert III, Count of Namur, on Frederick's death. Frederick, Duke of Lower Lorraine Frederick, Duke of Lower Lorraine, also known as "Frederick of Luxembourg" ( – 18 May 1065) was the count of Malmedy from 1035 and Duke of Lower Lorraine from 1046. He was a younger son of Frederick, Lord of Gleiberg. In 1044, Gothelo I, duke of both Lorraines, died and his eldest son, Godfrey, succeeded in only the upper duchy while the Emperor Henry III first threatened to give