Columbia subject headings:
Scotland--History--1057-1603.
Somerled, approximately 1100-1164.
Harvard subject headings:
Celts--Scotland--History--To 1500.
Revolutionaries--Scotland--Biography.
Scotland--History--1057-1603--Biography.
Scotland--History--1057-1603.
Somerled, approximately 1100-1164.
Somerled, of Argyll.
Princeton subject headings:
Scotland--History--1057-1603.
Somerled, of Argyll.