Authors
- Jane Oakhill
- John Oakland
- A. Oakley
- Amy Oakley
- Ann Oakley
- Barry Oakley
- Benjamin Oakley
- C.A. Oakley
- Charles A. Oakley
- Derek Oakley
- Don Oakley
- E. Russell Oakley
- E.R. Oakley 2
- Graham Oakley 5
- K.P. Oakley
- Kenneth P. Oakley
- Michael Oakley 1
- Mike Oakley
- Robin Oakley
- Stewart P. Oakley
- John Oakman
- Robert F. Oaks
- John Oaksey
- Ewart Oakshott
- Ronald Ewart Oakshott
- W.R. Oaten
- A.S. Oates
- Carl Oates 1
- D. Oates
- David W. Oates
- J.A. Oates
- Joan Oates
- John Oates
- Jonathan Oates
- Joyce Carol Oates
- Phyllis Bennett Oates
- C.W. Oatley
- Charles Oatley
- J.A. Oats
- L.B. Oatts
- Toshishio Obata
- Mohammed Obeid
- J. Obelkevich
- James Obelkevitch
- William B. Ober
- Don Oberdorfer
- Erik Oberg
- Ralf Obergfell 1
- Harry C. Oberholser
- Heinrich Oberjohann
- Oberlander Trust
- Ernst Obermaier
- H.A. Oberman
- Sheldon Oberman
- Horst J. Obermayer
- Merle Oberon
- Ulrich Oberprieler
- Leonard Obert
- Hermann Oberth
- Amir Obhodas
- M.M. Oblinger
- Dimitri Obolensky
- Martine Oborne
- Sergei Obraztsov
- Hans Ulrich Obrist
- Diogenes R. Ocampo
- Victoria Ocampo
- Michael Occleshaw
- D. Occomore
- David Occomore
- William R. Ochieng
- Don Ochoa
- L.C. Ockenden 2
- Michael Ockenden
- K.U. Ockendon
- Starr Ockenga
- H.W. Ockerman
- Wolfgang Ockert
- William Of Ockham
- Imre Ocsag
- Gilbert Odd
- Bill Oddie
- E.M. Oddie
- Kevin Odegard
- Warren W. Odegard
- A.L. Odell
- Carol Odell
- George Odell
- Peter Odell
- Robin Odell
- Francois Odendall
- David S. Oderberg
- Martin Odersky 1
- Clifford Odets
- A. Odga
- George Odgers
- J.F. Odgers
- Sally Odgers
- Sally Farrell Odgers 1
- Francis Odle