Alphabetical by Last Name

Patrick O'Brien
Michael Oakeshott
Barbara Oegg
Old Testament (Various Authors)
William Abbott Oldfather
Franz Oppenheimer
Rev. William Edwin Orchard
Origen
James Otis
Mack Ott
Richard Overton
John Owen
M.D. O’Brien
Gerald P. O’Driscoll
Dennis O’Keeffe