Columbia subject headings:
Harvard subject headings:
Emperors--Rome--Biography
Emperors--Rome--Family
Rome--History--Empire, 30 B.C.-476 A.D.--Chronology.
Princeton subject headings:
Emperors--Rome--Biography.
Emperors--Rome--Family.
Rome--History--Empire, 30 B.C.-476 A.D.--Chronology.