Columbia subject headings:
Great Britain--History--Norman period, 1066-1154.
Normandy (France)--History--To 1515.
Harvard subject headings:
Great Britain--History--Norman period, 1066-1154.
Normandy (France)--History--To 1515.
Princeton subject headings:
Great Britain--History--Norman period, 1066-1154.
Great Britain--Kings and rulers--Succession.
Henry II, King of England, 1133-1189.
Matilda, Empress, consort of Henry V, Holy Roman Emperor, 1102-1167.
Normandy (France)--Kings and rulers--Succession.
Robert, Earl of Gloucester, approximately 1090-1147.
William I, King of England, 1027 or 1028-1087.