article: William Longsword
links: Rollo Excommunication England Christian Montreuil, Pas-de-Calais Falaise Ponthieu Richard I, Duke of Normandy Évreux Hugh the Great Franks Picquigny Avranches List of French monarchs Viking Normans Louis IV of France Bretons Duke of Normandy Rudolph of France Cotentin Peninsula Arnulf I, Count of Flanders Somme Beauvais Amiens West Francia