Columbia subject headings:
Genealogists--Russia--Biography.
Nobility--Russia.
Russia--Genealogy.
Harvard subject headings:
Genealogists--Russia--Biography.
Kings and rulers--Genealogy.
Nobility--Genealogy
Nobility--Russia
Russia--Genealogy.
Princeton subject headings:
Genealogists--Russia--Biography.
Nobility--Russia.
Russia--Genealogy.