O
Flann O'Brien
Robert C. O'Brien
Alex O'Connor
Kevin O'Donnell, Jr
Lawrence O'Donnell
R. C. O'Gonnam
S. V. O'Jay
Stephen O'Kane
Alan O'Keefe
Daniel O'Mahony
Kevin O'Malley
Steve O'Neale
Dennis O'Neil
Denny O'Neil
Gerard K. O'Neill
Joseph O'Neill
Ulrike O'Reilly
Darren O'Shaughnessy
Pat O'Shea
Steve Oakey
Graham Oakley
John October
Colin Odell
Kenzaburo Oe
Andrew J. Offutt
Chris Ogden
Christopher Ogden
Mark Ogier
Ben Okri
Denise Okuda
Michael Okuda
Joseph D. Olander
Marc Olden
Mrs A. Oldham
Paul Oldroyd
Fred Oliphant
Lance Olsen
Paul F. Olson
Jerry Oltion
Vincent Omniaveritas
John Oram
John D. Oram
John R. Oram
Neil Oram
Douglas Orgill
Kate Orman
Dean Ormston
William Osborne
Keith Otter
Susan Oudot
Pierre Ouellette
Chris Ould
Simon Ounsley
John Owen
John D. Owen
Ray Owen
P. L. Owings