Columbia subject headings:
Ireland--History--1172-1603.
Harvard subject headings:
Celts--Ireland--History.
Celts--Ireland.
Ireland--History--1172-1603.
Ireland--History--17th century.
Ireland--History.
Land settlement--Ireland--History.
Land tenure--Ireland--History
Landlord and tenant--Ireland--History.
Princeton subject headings:
Ireland--History--1172-1603.