Columbia subject headings:
Aristocracy (Social class)--Spain.
Nobility--Spain.
Spain--History--711-1516.
Harvard subject headings:
Castile (Spain)--Biography.
Castile (Spain)--Genealogy.
Leon (Kingdom)--Biography.
Leon (Kingdom)--Genealogy.
Nobility--Spain--Castile--Biography.
Nobility--Spain--Castile--Genealogy.
Nobility--Spain--Leon (Kingdom)--Biography.
Nobility--Spain--Leon (Kingdom)--Genealogy.
Princeton subject headings:
Castile (Spain)--Genealogy.
Leon (Kingdom)--Genealogy.
Nobility--Leon (Kingdom)--Genealogy.
Nobility--Spain--Castile--Genealogy.