Columbia subject headings:
Gentry--England--History--To 1500.
Knights and knighthood--England--History--To 1500.
Harvard subject headings:
Gentry--England--History--To 1500.
Knights and knighthood--England--History--To 1500.
Princeton subject headings:
Gentry--England--History--To 1500.
Knights and knighthood--England--History--To 1500.