Eudes IV married the heiress, Jeanne, of the Free County of Burgundy, and then his grandson Philip was preparing to marry the heiress, Margaret, of the County of Flanders.
Dukes of Gascony, 768-1038 AD The culture of the South of France in the 12th century is one of the first signs of the revival of civilization in Francia after the "second Dark Age" of the 9th and 10th centuries.
Duke William V had three wives, and subsequent Dukes were descendants of William VIII, son of William V and Agnes of Burgundy.
The Normans were a mixture of the indigenous Gauls and of the Viking invaders under the leadership of Rollo, who besieged Paris and was given the area of Normandy (Treaty of St.-Claire-sur-Epte, 911) in return for defending it against future pirate attacks.
Rollo's descendant William, Duke of Normandy, invaded England in 1066 and became king William I of England.
However, she is not regarded as Duke of Normandy outside her realms since claims by English monarchs to the title were given up by the Treaty of Paris of 1259.