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 William, Duke of Courland Frederick William, Duke of Courland Frederick William (; 19 July 1692 – 21 January 1711) was Duke of Courland and Semigallia from 1698 to 1711. Frederick Wilhelm was the son of Frederick Casimir Kettler and Elisabeth Sophie of Brandenburg. During his reign the duchy was occupied by Swedish and later by Russian troops. Friedrich Wilhelm Kettler was born in 1692 in Jelgava in the family of Friedrich Casimir and his second wife Elizabeth Sophia. At the age of seven, after his father's death, in the 22 January 1698 he was appointed as the Duke of Courland and Semigallia, however, until