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- Nystrom, Hon. Lorne E., P.C., B.A.
- O'Brien, Kevin (Gander)
- O'Brien, Lawrence D. (Labrador)
- O'Brien, Patrick W., B.A. (Hons.), M.Ed. (London-Fanshawe)
- O'Brien, William
- O'Connor, Gordon (Carleton—Mississippi Mills)
- O'Connor, Hon. Terrence Patrick, B.A., B.C.L.
- O'Connors of Connacht
- O'Conor, Charles, of Balenagare
- O'Donnell, Cecil (Shelburne)
- O'Donovan, John
- O'Keefe, Hon. John A., Q.C., LL.B.
- O'Mahony, Conor, S. J
- O'Neill, Hugh, Second Earl of Tyrone
- O'Neill, Mary, B.A. (St. Albert)
- O'Neill, Terence
- O'Reilly, Hon.
- O'Toole, John, B.A. (Durham)
- Oakboys and Steelboys
