Proper noun
A country, a duchy in Europe, now only composed of the Channel Islands in the English Channel; a crown possession of the Monarch of England, since the Conquest of England by William the Conqueror, Duke of Normandy; bureaucratically, it is administered by the in the United Kingdom
A historical duchy in France, located on the Normandy peninusla, and surround coast, that became the province of Normandy
Source: en.wiktionary.orgHe needed money to fund this venture and pledged his Duchy of Normandy to William in return for a payment of 10,000 marks—a sum equalling about a quarter of William's annual revenue. Source: Internet
The choir and west front of the Abbey of Saint-Denis both became the prototypes for further building in the royal domain of northern France and in the Duchy of Normandy. Source: Internet
The Normans were descended from Vikings who were given feudal overlordship of areas in northern France—the Duchy of Normandy —in the 10th century. Source: Internet
To Robert he granted the Duchy of Normandy and to William Rufus he granted the Kingdom of England. Source: Internet