At Columbia, Commager mentored a series of distinguished historians who earned their Ph.D. degrees under his tutelage, including Harold Hyman, Leonard W. Levy, and William E. Leuchtenburg.
Harold Pinter | Harold Wilson | Harold Macmillan | Harold Bloom | Harold Godwinson | Harold Lloyd | Harold Stassen | Harold Prince | Hyman G. Rickover | J. Harold Ellens | Harold Holt | Sir Harold Hillier Gardens | Harold Washington | Harold Hitz Burton | Harold Alexander, 1st Earl Alexander of Tunis | Harold Peto | Harold & Kumar Go to White Castle | Harold Arlen | Harold | Rob Hyman | Harold Budd | Harold Eugene Edgerton | Harold Bauer | Phyllis Hyman | Harold von Schmidt | Harold Robbins | Harold Laski | Harold Gould | Harold Gillies | Harold Bradley |