Columbia subject headings:
Ireland--Genealogy.
Ireland--History--Sources.
Ireland--History--To 1172.
Irish language--Middle Irish, 1100-1550--Texts.
Northmen--Ireland.
Harvard subject headings:
Ireland--Genealogy.
Ireland--History--Sources.
Ireland--History--To 1172.
Northmen in Ireland.
Northmen--Ireland.
Princeton subject headings:
Brian, King of Ireland, 926-1014.
Ireland--Genealogy.
Ireland--History--Sources.
Ireland--History--To 1172.
Irish language--Middle Irish, 1100-1550--Texts.
Northmen--Ireland.