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Lawrence O'Connor — Durham--York
Terrance P. O'Connor — Oakville
Hamilton Parke O'Connor — Bruce South
Daniel John O'Donoghue — Ottawa
George O. O'Keefe — Ottawa (2 Seats)
Hugh Patrick O'Neil — Quinte
Yvonne O'Neill — Ottawa--Rideau
John O'Neill — Toronto Southeast -- Seat A
John C. O'Sullivan — Peterborough East
John O'Toole — Durham; Durham East
George Oakley — Riverdale
Steven Offer — Mississauga North
Leslie Warner Oke — Lambton East
Neil Leverne Olde — Middlesex South
Adam Oliver — Oxford South
Farquhar Robert Oliver — Grey South
David Orazietti — Sault Ste. Marie
Gilbert Wellington Ostrom — Hastings West
Jerry J. Ouellette — Oshawa
Cyril Arthur Goodwin Overall — Niagara Falls
Bruce Owen — Simcoe Centre
Stephen David Owens — Scarborough Centre
Edward William James Owens — Toronto South -- Seat A; Toronto Southeast -- Seat A; Toronto Southeast -- Seat B

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