Authors starting with O
- O. Henry66
- Odilo Globocnik6
- Oliver Cromwell117
- Oliver Goldsmith111
- Oliver Hazard Perry12
- Oliver Wendell, Jr. Holmes21
- Oliver Wendell, Sr. Holmes21
- Olof Palme13
- Omar Bradley10
- Omar Khayyam107
- Oprah Winfrey68
- Orhan Pamuk13
- Orlando Bloom34
- Orlando Jones18
- Orson Scott Card1126
- Orson Welles61
- Osama bin Laden43
- Oscar Niemeyer36
- Oscar Wilde262
- Osho60
- Osip Mandelstam14
- Oswald Chambers14
- Oswald Pohl13
- Otto Skorzeny11
- Ovid110
- Owain Owain2
- Ozzy Osbourne112