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People
- O'Banyoun
- O'Boyle
- O'Brecht
- O'Brecht, Gregor
- O'Brecht, Jack
- O'Brien
- O'Brien Park
- O'Brien Park Advisory Committee
- O'Brien's Tap House
- O'Brien, (Father)
- O'Brien, C. L.
- O'Brien, Con
- O'Brien, Dan
- O'Brien, Edward
- O'Brien, Elsie (Mrs.)
- O'Brien, Elsie May
- O'Brien, Emma
- O'Brien, Henry
- O'Brien, J. H.
- O'Brien, Jack
- O'Brien, James
- O'Brien, John
- O'Brien, John Harold (Dr.)
- O'Brien, Letitia
- O'Brien, Lucius
- O'Brien, Maggie
- O'Brien, Mary
- O'Brien, Nora
- O'Brien, Rebecca
- O'Brien, Rob
- O'Brien, Thomas
- O'Brien, William
- O'Bright, Judy
- O'Callaghan, Cornelius
- O'Callaghan, E. J.
- O'Connell
- O'Connell, Daniel
- O'Connell, Edward
- O'Connell, H.
- O'Connell, Henry
- O'Connell, Mary Esther
- O'Connell, Michael Thomas
- O'Connell, Moreen
- O'Conner, Brian
- O'Conner, F. P.
- O'Conner, Francis
- O'Conner, Joseph
- O'Connor
- O'Connor, (Miss)
- O'Connor, Anne
- O'Connor, David
- O'Connor, Edward
- O'Connor, Elizabeth
- O'Connor, Frank P.
- O'Connor, Georgina
- O'Connor, Jane
- O'Connor, John
- O'Connor, Joseph
- O'Connor, Leo
- O'Connor, Mary
- O'Connor, Maureen Busby
- O'Connor, Peter
- O'Connor, T. P.
- O'Dell
- O'Dell, Violet
- O'Dette, Paul
- O'Donaghue
- O'Donaghue, James
- O'Donaghue, Mary
- O'Donaghue, Richard
- O'Donald
- O'Donnel
- O'Donnel, Michael C.
- O'Donnell
- O'Donnell (Mrs.)
- O'Donnell, Alice
- O'Donnell, Austin
- O'Donnell, Catherine
- O'Donnell, Elizabeth Regina
- O'Donnell, Ellen
- O'Donnell, Ethel
- O'Donnell, Genevieve
- O'Donnell, Gertrude
- O'Donnell, Helen
- O'Donnell, J.
- O'Donnell, James
- O'Donnell, John
- O'Donnell, John Joseph
- O'Donnell, Joseph
- O'Donnell, Louise
- O'Donnell, Margaret
- O'Donnell, Pat
- O'Donnell, Patrick
- O'Donnell, Paul
- O'Donnell, Rose
- O'Donnell, Steve
- O'Donnell, Thomas
- O'Donnell, William (Mrs.)
- O'Donoghue
- O'Donoghue, Mary
- O'Doyle
- O'Drowsky, Holly
- O'Dwyer
- O'Dwyer, Joseph
- O'Dwyer, Lynne
- O'Farrell
- O'Flynn, Stephen Franklin Miles
- O'Grady
- O'Grady, Alice
- O'Grady, F.
- O'Grady, Francis
- O'Halloran-Schut, Monica
- O'Hara, Margaret
- O'Hea, James
- O'Henney, Arabella
- O'Keefe
- O'Keefe Centre
- O'Keefe, Bridget
- O'Keefe, Eddie
- O'Keefe, L.
- O'Keefe, P.
- O'Keefe, Stewart
- O'Keeffe
- O'Keeffe, Edmund
- O'Keeffe, L.
- O'Keeffes
- O'Lachlan, Patrick
- O'Leary, John
- O'Loane
- O'Loughlin, D.
- O'Mahony
- O'Malley
- O'Mara
- O'Mara's Packing Factory
- O'Neal
- O'Neal, Bryon
- O'Neal, Carolyn
- O'Neal, Michael
- O'Neil Supply Company
- O'Neil, Becky
- O'Neil, Carson
- O'Neil, Edward
- O'Neil, Ernie
- O'Neil, James G.
- O'Neil, Louie
- O'Neil, Steve
- O'Neill Supply Company, The
- O'Neill, Bernard
- O'Neill, Bill
- O'Neill, J. D.
- O'Neill, James
- O'Neill, L.
- O'Neill, Linda
- O'Neill, Mary
- O'Neill, Mike
- O'Neill, Steve
- O'Reilly
- O'Reilly, (Mr.)
- O'Reilly, Adrienne
- O'Reilly, Catharine
- O'Reilly, Daniel
- O'Reilly, Deborah
- O'Reilly, George
- O'Reilly, Gerald
- O'Reilly, Gerald (Dr.)
- O'Reilly, Gerald (Rev.)
- O'Reilly, Harriet
- O'Reilly, Jack
- O'Reilly, James
- O'Reilly, John
- O'Reilly, Leila
- O'Reilly, Martha
- O'Reilly, Miles
- O'Reilly, William
- O'Rourke
- O'Rourke, Eamonn
- O'Rourke, James
- O'Rourke, Johanna Collins
- O'Rourke, Michael
- O'Rourke, Patrick
- O'Rourke, Thomas
- O'Shea, Harry
- O'Shea, M. M. (Dr.)
- O'Shea, Patrick
- O'Sullivan
- O'Sullivan, Evelyn
- O'Sullivan, James
- O'Sullivan, Jim
- O'Sullivan, Mary
- O'Sullivan, Pat
- O'Sullivan, Sharon
- O'Toole, Frederick
- O'Toole, J. (Mrs.)
- O'Toole, Katherine
- O'Toole, Margaret
- O'Toole, Mrs.
- O. B. Henry Hardware Company
- O. C. T. U.
- O. G. S. Bulletin
- O. K. Laundry
- O. K. Welding
- O. P. P.
- O. T. S. Holding Company Limited
- OAC Gridiron News
- OAC, Guelph
- OLG
- OWL Magazine
- Oak
- Oak Baseball Club
- Oakes
- Oakes, (Col.)
- Oakes, (Mrs.)
- Oakes, (Porky)
- Oakes, Annie
- Oakes, Beatrice
- Oakes, Brian
- Oakes, Carl
- Oakes, Charles
- Oakes, Charles E.
- Oakes, Charles Walton
- Oakes, Curt
- Oakes, Dick
- Oakes, Don
- Oakes, Doris
- Oakes, Ed (Mrs.)
- Oakes, Edwin
- Oakes, Edwin L.
- Oakes, Ellen
- Oakes, Emma
- Oakes, Florence
- Oakes, Frances (Miss)
- Oakes, Frances Marian
- Oakes, Frank (Mrs.)
- Oakes, G. H.
- Oakes, Greg
- Oakes, Gregory
- Oakes, Harold
- Oakes, Harry G. (Mrs.)
- Oakes, Hazel
- Oakes, Hazel E.
- Oakes, Helen
- Oakes, Henry
- Oakes, Henry (Mrs.)
- Oakes, Ida M.
- Oakes, Irene
- Oakes, J.
- Oakes, J. L. (Mrs.)
- Oakes, J. W.
- Oakes, J. Wilfred
- Oakes, Jack
- Oakes, James
- Oakes, James (Mrs.)
- Oakes, James Hudson
- Oakes, Jean
- Oakes, Jean (Mrs.)
- Oakes, John Wilfred
- Oakes, Jonathon
- Oakes, Joseph
- Oakes, Joseph L.
- Oakes, Joseph Lister
- Oakes, Joyce
- Oakes, Leslie
- Oakes, Leslie "Dick"
- Oakes, Louise
- Oakes, Mae White
- Oakes, Maria
- Oakes, Mary Ellen
- Oakes, May
- Oakes, Milton
- Oakes, Monte
- Oakes, Peart
- Oakes, Rita
- Oakes, Ron
- Oakes, Roy
- Oakes, Sonja
- Oakes, Susie
- Oakes, Susie L.
- Oakes, T.
- Oakes, Thelma
- Oakes, Thelma (Miss)
- Oakes, Wallace
- Oakes, Wilfred H.
- Oakes, William Albert
- Oakesmuir Curly Horse Ranch
- Oakley
- Oakley, Annie
- Oakley, Archie
- Oakley, Elaine
- Oakley, George
- Oakley, Ken
- Oakley, Patricia Ann
- Oakman
- Oakman, Alan
- Oakman, Allan
- Oakman, C.
- Oakman, Catherine
- Oakman, Clifford
- Oakman, Jane
- Oakman, Mary
- Oakman, Phyllis
- Oakman, Violet
- Oakman, William
- Oaks
- Oaks, Brian
- Oaks, Charlie
- Oaks, Robert
- Oaksmuir Curly Horse Ranch
- Oakwood
- Oales, Eliza Cerintha
- Oar, Betty
- Oar, Margaret
- Oasis Outdoor Restaurant
- Oates, Brian
- Oatmeal Mill, The
- Oatmill Mill
- Obeidi, Yazan
- Oberholtzer
- Oberkampf, Albert
- Obi, Setsuko
- Oblander
- Oblander, Andrew
- Oblander, Catherine
- Oblate Fathers
- Obrecht, L.
- Obright, Bob
- Occomore
- Occomore, H.
- Ocean Blend Tea Company Limited
- Ochs, Charles
- Ochs, Clara
- Ochs, Ike
- Ochs, Margaret
- Ochs, Minnie
- Ochs, W. H.
- Odell
- Odell, Charles
- Odell, Charles Grange
- Odell, Violet
- Odeon Theatre
- Oding, Andy
- Odlum, G. (Mr.)
- Odrowski
- Oehm Hardware and Farm Supply
- Oehm, Arthur
- Oehm, Noah
- Oehm, Reuben
- Oestreicher, Marilyn
- Oestreicher, Ruth
- Oetzmann
- Office Outfitters
- Office fo the Surveyor General
- Office of Public Roads and Highways (Ontario)
- Office of the Board of Works
- Office of the Registrar General
- Officer
- Officer's Garage
- Officer, Elizabeth
- Officer, Florence
- Officer, Matilda
- Ogden
- Ogden, Edward
- Ogden, Elizabeth
- Ogden, Emma
- Ogden, J. P.
- Ogden, John
- Ogden, Mary
- Ogden, William
- Ogg, A. M.
- Ogilvie
- Ogilvie Flour Mills
- Ogilvie and Company
- Ogilvie, A. J.
- Ogilvie, Catherine
- Ogilvie, David
- Ogilvie, Fred
- Ogilvie, Lucy
- Ogilvie, Will
- Ogilvie, William
- Ogilvy, Alexander and Anderson
- Ogletree, Frank (Mrs.)
- Ogram
- Ogram, Robert
- Ohio and Mississippi Railway
- Ohlhauser
- Ohtake, Ayako
- Ojamae, Tamara
- Ojibwa
- Olan Mills
- Oland, Erik
- Old '81
- Old Age Pensions Commission
- Old Age Security
- Old Anglican Cemetery
- Old Anglican Cemetery, Elora
- Old Anglican Cemetery, Glen Allan
- Old Anglican Church, Fergus
- Old Bissell House
- Old Bissell House Bed and Breakfast
- Old Boy's Reunion
- Old Boys Association
- Old Boys Club Hillsburg
- Old Colony Mennonite Cemetery
- Old Colony Mennonite Church
- Old Drayton Cemetery
- Old Growth Forest Project
- Old Harriston Cemetery
- Old Home Week
- Old Hotel Restaurant
- Old House Journal
- Old Livery, The
- Old Log Church Cemetery, Wallenstein
- Old Melville Church
- Old Methodist Cemetery
- Old Mill Brewery
- Old Mill Quilts and Company
- Old People's Home
- Old Presbyterian Cemetery
- Old Projection Room
- Old Projection Room Limited
- Old Quebec Street
- Old Salem General Store
- Old Salem Schoolhouse Pottery Studio
- Old Salem Schoolhouse Studio
- Old Soul Resale Furniture and Art
- Old Southampton Cemetery
- Old Tanning Mill
- Old Upright Farm
- Old Zion Cemetery
- Olde Bridge Place Bed and Breakfast
- Olde Hide House
- Oldender, Deb
- Older Voices
- Oldfield, Bruce
- Oldfield, Bruce (Mrs.)
- Oldfield, Don
- Oldfield, J. B. (Dr.)
- Oldfield, Kaye
- Oldfield, Martha Emma
- Oldfield, Robert
- Oldham
- Oldham, Mable
- Oldridge, Ken
- Olds Publishing
- Olds, Gertrude May
- Oldsmobile
- Oldtimers Hockey
- Oleksandriw, Lidia
- Olesen, Diana
- Olfield, Kay
- Olifiers, Sarah
- Olinger, J. W.
- Olinski, Dianne
- Olinsky, A. J. (Rev.)
- Oliphant
- Oliphant, David
- Oliphant, William
- Oliveira, Gary
- Oliver
- Oliver Methodist Church
- Oliver's Brewery
- Oliver, (Mrs.)
- Oliver, A.F.
- Oliver, Albert (Gordon)
- Oliver, Alexander
- Oliver, Andrew
- Oliver, Catharine
- Oliver, Celeste Ann
- Oliver, Emma
- Oliver, Frank
- Oliver, Freddie
- Oliver, G. W. (Rev.)
- Oliver, George
- Oliver, George W. (Rev.)
- Oliver, H.
- Oliver, H.E.
- Oliver, Helen D.
- Oliver, Henry Huggard
- Oliver, Henry Robert
- Oliver, James
- Oliver, John
- Oliver, Margo
- Oliver, Marguerite
- Oliver, Mary
- Oliver, Mary Elizabeth
- Oliver, Nellie
- Oliver, Norman
- Oliver, Paul
- Oliver, Phil
- Oliver, Richard
- Oliver, Robert
- Oliver, Robert (Bob)
- Oliver, Russell
- Oliver, Ruth
- Oliver, W. W. (Rev.)
- Oliver, William H.
- Olivero, Adam
- Olivero, Bob
- Olivet Cemetery
- Olivet Mennonite Cemetery
- Olivet Methodist Church
- Olivetti
- Ollers, Janet
- Olliff
- Olliff, Bruce
- Olmsted Brothers
- Olsen, Annie
- Olsen, L. O.
- Olsen, Tanya
- Olson
- Olson, Ivy
- Olson, Lila (Miss)
- Olson, Scott
- Olszewski, Maureen
- Olver, J. M.
- Olympic Honda
- Olympic Lacrosse Team
- Olympic Restaurant
- Olympics
- Omand, Florence
- Omega Tau Sigma Fraternity
- Omer
- On the Spot Productions
- One M Printing Company
- One and Only Handmade Marketplace
- Ongarato
- Ongarato, Rinaldo
- Onifrichuk, Kathy
- Only Deals $1 Store
- Onstad, Gloria Pelletier
- Ontario 4-H Council
- Ontario Agri-Food Education Incorporated
- Ontario Agricultural College
- Ontario Agricultural College Contingent
- Ontario Agricultural College Dairy Dept.
- Ontario Agricultural College and Experimental Farm
- Ontario Agricultural Commission
- Ontario Agricultural Exhibition
- Ontario Agricultural Farm
- Ontario Agricultural Hall of Fame
- Ontario Agricultural Museum
- Ontario Agricultural Society
- Ontario Amateur Lacrosse Association
- Ontario Archeological and Heritage Sites Board
- Ontario Archives
- Ontario Artist Blacksmith Association
- Ontario Arts Council
- Ontario Association Architects
- Ontario Association of Agricultural Societies
- Ontario Association of Certified Engineering Technicians
- Ontario Association of Landscape Architects
- Ontario Association of Real Estate Boards
- Ontario Association of Road Supervisors
- Ontario Athletic Association
- Ontario Automobile Association
- Ontario Bakeries Limited
- Ontario Bank
- Ontario Beekeepers' Association
- Ontario Bicentennial
- Ontario Blue Cross
- Ontario Board of Agriculture
- Ontario Board of Examiners
- Ontario Broiler Hatching Egg and Chick Commission
- Ontario Building Code
- Ontario Building Officials Association
- Ontario Business College
- Ontario Cafe
- Ontario Car Works
- Ontario Cemetery Association
- Ontario Century Digest
- Ontario Civilian Defence Committee
- Ontario Civilian Defense Committee
- Ontario Club
- Ontario College of Art
- Ontario College of Art and Design
- Ontario College of Education
- Ontario College of Pharmacy
- Ontario Community Newspaper Association
- Ontario Concentrated Milk Producers Association
- Ontario Correctional Centre
- Ontario Council of Archives
- Ontario Court of Appeal
- Ontario Craft Council
- Ontario Cream Producers' Marketing Board
- Ontario Curling Association
- Ontario Dental Association
- Ontario Department of Agriculture
- Ontario Department of Agriculture Extension Branch
- Ontario Department of Agriculture and Food
- Ontario Department of Education
- Ontario Department of Game and Fisheries
- Ontario Department of Health
- Ontario Department of Highways
- Ontario Department of Labour
- Ontario Department of Mines
- Ontario Department of Municipal Affairs
- Ontario Department of Planning and Development
- Ontario Department of Tourism and Information
- Ontario Department of Transport
- Ontario Director of Child Welfare
- Ontario Division of Mines
- Ontario Early Years Services
- Ontario Education Association
- Ontario Education Department
- Ontario Educational Association
- Ontario Energy Board
- Ontario Environmental Farm Plan
- Ontario Executive Council
- Ontario Experimental Farm
- Ontario Farm Animal Council
- Ontario Farm Service Force
- Ontario Farmers Union
- Ontario Farmers' Weather Insurance Mutual Company
- Ontario Farmland Trust
- Ontario Federation for Cerebral Palsy
- Ontario Federation of Agriculture
- Ontario Federation of Home and School Associations
- Ontario Field Hockey Team
- Ontario Fire Marshall
- Ontario Fur Farmers Association
- Ontario Games For the Physically Disabled
- Ontario Gazette
- Ontario Genealogical Society
- Ontario General Contractors Association
- Ontario Good Roads Association
- Ontario Grape Growing and Wine Manufacturing Company
- Ontario Health Insurance
- Ontario Heart Foundation
- Ontario Heritage Act
- Ontario Heritage Foundation
- Ontario Heritage Trust
- Ontario Historical Society
- Ontario Hog Producers Marketing Board
- Ontario Hog Producers' Association
- Ontario Home Gardener
- Ontario Home Renewal Program
- Ontario Horticultural Association
- Ontario Horticultural Society
- Ontario Hospital
- Ontario Hospital Association Incorporated
- Ontario Hospital Insurance Commission
- Ontario Hospital Services Commission
- Ontario Hospital for the Insane
- Ontario House
- Ontario Housing Corporation
- Ontario Hydro
- Ontario Hydro News
- Ontario Hydro Radial Railway
- Ontario Hydro-Electric Power Commission
- Ontario Insurance Agents' Association
- Ontario Investment and Savings Society
- Ontario Jersey Directories
- Ontario Junior Farm Club
- Ontario Labour Relations Board
- Ontario Lacrosse Association
- Ontario Ladies College
- Ontario Lawn Bowls Association
- Ontario Learning Association
- Ontario Liberal Association
- Ontario Library Association
- Ontario Library Review
- Ontario Loan and Debenture Company
- Ontario Lord's Day Alliance
- Ontario Lottery and Gaming Corporation Slots
- Ontario Malleable Iron Company of Canada
- Ontario March of Dimes
- Ontario Market Investment Fund
- Ontario Medical Association
- Ontario Milk Producer
- Ontario Milk Producers Association
- Ontario Minister of Agriculture
- Ontario Minister of Citizenship
- Ontario Minister of Education
- Ontario Ministry of Agriculture and Food
- Ontario Ministry of Agriculture, Food and Rural Affairs
- Ontario Ministry of Citizenship, Culture and Recreation
- Ontario Ministry of Community and Social Services
- Ontario Ministry of Consumer Relations
- Ontario Ministry of Consumer and Commercial Relations
- Ontario Ministry of Culture
- Ontario Ministry of Culture and Recreation
- Ontario Ministry of Culture, Tourism and Recreation
- Ontario Ministry of Education
- Ontario Ministry of Government Services
- Ontario Ministry of Health
- Ontario Ministry of Health and Long-Term Care
- Ontario Ministry of Highways
- Ontario Ministry of Housing
- Ontario Ministry of Industry and Tourism
- Ontario Ministry of Industry, Trade and Technology
- Ontario Ministry of Intergovernmental Affairs
- Ontario Ministry of Labour
- Ontario Ministry of Lands, Forests, and Mines
- Ontario Ministry of Municipal Affairs
- Ontario Ministry of Municipal Affairs and Housing
- Ontario Ministry of Natural Resources
- Ontario Ministry of Public Works
- Ontario Ministry of Railways and Canals
- Ontario Ministry of Tourism and Recreation
- Ontario Ministry of Transportation
- Ontario Ministry of Transportation and Communication
- Ontario Ministry of Treasury
- Ontario Ministry of the Environment
- Ontario Minor Lacrosse Association
- Ontario Motor League
- Ontario Motorist Publishing Company
- Ontario Multicultural History Society of Ontario
- Ontario Municipal Board
- Ontario Municipal Electric Association
- Ontario Municipal Stationers
- Ontario Museum Assocation
- Ontario Museums Assocation
- Ontario Mutual Insurance Association
- Ontario Mutual Life Assurance Company
- Ontario Natural Gas Storage and Pipeline Limited
- Ontario Network of Needleworkers
- Ontario Northland Railway
- Ontario Office Outfitters Limited
- Ontario Parks Association
- Ontario Photo Church Directories
- Ontario Place
- Ontario Playwright's Showcase
- Ontario Plowing Match
- Ontario Plowmen's Association
- Ontario Pork
- Ontario Pork Industry Improvement Plan
- Ontario Pork Producers' Association
- Ontario Poultry Producers Association
- Ontario Power Authority
- Ontario Prison Farm
- Ontario Produce Company
- Ontario Property Assessment Corporation (OPAC)
- Ontario Provincial Board of Health
- Ontario Provincial Court
- Ontario Provincial Police
- Ontario Provincial Secretary
- Ontario Provincial Winter Fair
- Ontario Public Interest Research Group
- Ontario Public School Inspectors Association
- Ontario Rail
- Ontario Railway and Municipal Board
- Ontario Realty Corporation
- Ontario Reformatory
- Ontario Region Department of Public Works
- Ontario Registrar General
- Ontario Retail Farm Equipment Dealers' Association
- Ontario Retail Feed Dealers Association
- Ontario Retail Hardware Assn.
- Ontario Rifle Association
- Ontario Rifles
- Ontario Rural Learning Assocation
- Ontario Rural Municipal Association
- Ontario Rural Softball Assn.
- Ontario School For the Blind
- Ontario School Trustees Council
- Ontario School Trustees and Ratepayer Associaition
- Ontario School of Art
- Ontario Science Centre
- Ontario Secondary School Teachers' Federation
- Ontario Securities Commission
- Ontario Seed and Grain Seperator Company Limited
- Ontario Sheep Breeders Association
- Ontario Shorthorn Club
- Ontario Society For Autistic Children
- Ontario Society For Autistic Citizens
- Ontario Society for Industrial Archeology
- Ontario Society for the Prevention of Cruelty to Animals (OSPCA)
- Ontario Society of Artists
- Ontario Society of Radiological Technicians
- Ontario Soil and Crop Improvement Association
- Ontario Steam Heritage Museum
- Ontario Stock Yards
- Ontario Streams
- Ontario Sugar Company Limited
- Ontario Teachers' Manuals
- Ontario Teachers' Pension Board
- Ontario Teachers' Superannuation Commission
- Ontario Temperance Federation
- Ontario Threshermen's
- Ontario Threshermen's Mutual Fire Insurance Company
- Ontario Tile
- Ontario Trails Council
- Ontario Training School
- Ontario Training School For Girls
- Ontario Travel and Publicity
- Ontario Treasury Department Gasoline Tax Branch
- Ontario Trillium Foundation
- Ontario Turfgrass Institute
- Ontario Underwriters' Association
- Ontario Vaccine Farm
- Ontario Veterinary College
- Ontario Volunteer Service Awards
- Ontario Water Resources Commission
- Ontario Wheat Producers Marketing Board
- Ontario Whole Milk Producers League
- Ontario Wind Engine and Pump Company
- Ontario Woman's Christian Temperance Union
- Ontario Women's Institute
- Ontario Youth Rainbow Coalition
- Ontario and Kootenay Prospecting and Development Company
- Ontario and Ottawa Railway
- Ontario and Quebec Railway
- Ontarion, The newspaper
- Ontman, Sophia
- Oosterhuis, James
- Oosterveld, Peter
- Opal Rebekah Lodge No. 301, Mount Forest
- Opera House Pharmacy
- Opie, Glen
- Opperthauser, Ruth
- Opportunity For Youth
- Opportunity Shop
- Oppose Belwood Wind Farm Association
- Optical Factory
- Optimist Club of Elora
- Optimist Club of Eramosa
- Optimist Club of Moorefield
- Optimist Club of Palmerston
- Oram, Helen
- Orange Hill Publishing Limited
- Orange Kist
- Orange Mutual Benefit Society of Ontario West
- Orange Mutual Insurance Society of Ontario West
- Orange Order
- Orangemen
- Orangeville Agricultural Society
- Orangeville Banner
- Orangeville Conservatories
- Orangeville Fall Fair
- Orangeville High School
- Orangeville Hospital
- Orangeville Masons
- Orangeville Opera House
- Orangeville Police Department
- Orangeville Post Office
- Orangeville Town Hall
- Orbst, Colleen Davis
- Orchard
- Orchard, Frederick
- Orchardville Roman Catholic Cemetery
- Ord
- Ord, A. H. (Mrs.)
- Ord, A. W. (Mrs.)
- Ord, Alec
- Ord, Alex
- Ord, Alex (Mrs.)
- Ord, Andrew
- Ord, Billy
- Ord, Don
- Ord, Effie
- Ord, J.
- Ord, John
- Ord, John (Mrs.)
- Ord, Ruth Marie
- Order of Foresters
- Order of Railroad Telegraphers
- Order of the Eastern Star
- Order of the Eastern Star, Palmerston/Harriston
- Orescan, Katy
- Orford String Quartet
- Orgam
- Organ, Art
- Organization of Small Urban Municipalities
- Orgues Letourneau
- Orhm, Walter
- Oriana Singers
- Orillia House
- Orillia Naturalists Club
- Orillia Packet and Times
- Orion Bible Class
- Orland, Lena
- Orm, George (Mrs.)
- Orm, Mabel
- Ormandy
- Ormandy and Ormandy
- Ormandy, Thomas
- Ormandy, William
- Orme
- Orme, A.
- Orme, James
- Orme, P.
- Orme, Peter
- Ormsby, Walter
- Orok, Helen
- Orr
- Orr, (Mrs.)
- Orr, Aggie
- Orr, Agnes Wasson Cunningham
- Orr, Alex
- Orr, Alex (Mrs.)
- Orr, Alexander
- Orr, Allan
- Orr, Billie
- Orr, Clarence
- Orr, Diane
- Orr, Dianne
- Orr, Elizabeth
- Orr, Elvin
- Orr, Emina
- Orr, Frances
- Orr, Francis
- Orr, Garth
- Orr, George
- Orr, Gertrude
- Orr, Harry
- Orr, Herbert
- Orr, Irene
- Orr, James
- Orr, Jean
- Orr, John
- Orr, Johnny
- Orr, Kathie
- Orr, Keith
- Orr, Kennedy
- Orr, Lola
- Orr, Margaret
- Orr, Marion
- Orr, Mary
- Orr, Mary (Mrs.)
- Orr, Mary Hutchinson
- Orr, Mary Jane (Polly)
- Orr, Mathilda
- Orr, Maude
- Orr, Mina
- Orr, Norman
- Orr, Olive (Miss)
- Orr, Pat
- Orr, Polly
- Orr, Robert
- Orr, Robert Kennedy
- Orr, Samuel
- Orr, Tilly
- Orr, William
- Orr, Winnifred Mable
- Orr, Wyn
- Orr, Zelmina
- Orrok
- Orso
- Orth, Glen
- Orthopedic Shoe Repairs
- Ortivici
- Ortlieb, Larry
- Ortman, Joachim
- Orton
- Orton Baseball Team
- Orton Church
- Orton Community Association
- Orton Community Church
- Orton Market
- Orton Park
- Orton Pastoral Charge
- Orton Post Office
- Orton Public School
- Orton Rifle Club
- Orton Sawmill
- Orton Women's Institute
- Orton, (Dr.)
- Orton, Anne
- Orton, G. T. (Mrs.)
- Orton, George
- Orton, George T.
- Orton, George T. (Dr.)
- Orton, Henry
- Orton, Henry (Dr.)
- Orton, Richard
- Orton, Richard (Dr.)
- Orton, T. A.
- Orton, Thomas
- Ortt, John
- Ortt, John D.
- Ortt, Lyn
- Orychuk
- Orythia-Jane’s Sewing Centre
- Osborn
- Osborn Cemetery
- Osborn, Fred
- Osborn, J. (Mrs.)
- Osborn, Margaret (Mrs.)
- Osborn, Margaret Isabelle May
- Osborn, Sharon
- Osborne
- Osborne Cemetery
- Osborne Collection of Early Children's Books
- Osborne Farms
- Osborne, A. W. (Rev.)
- Osborne, Ada Violet
- Osborne, Alice
- Osborne, Bill
- Osborne, E. W.
- Osborne, Earl
- Osborne, Evelyn G.
- Osborne, Fred
- Osborne, Fred (Mrs.)
- Osborne, Gilbert
- Osborne, Isabel
- Osborne, Isobel
- Osborne, James
- Osborne, John
- Osborne, Linda
- Osborne, Lloyd
- Osborne, Marie
- Osborne, Sonny
- Osborne, W. R.
- Osbourn, Fred
- Osbourne, Earl
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- Oscar Day's Livery Stable
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- Osteoporosis Society
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- Osteria La Cantina
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- Ostic, Betty
- Ostic, Clarissa (Miss)
- Ostic, Debbie
- Ostic, Edward
- Ostic, Edward W.
- Ostic, Florabel
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- Ottawa Central Archives
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- Ottewell, William (Rev.)
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- Otto, Brian
- Otto, Minnie
- Otto, Patrick (Dr.)
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- Oulton, Rachel
- Our Homes
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- Owen, Dawn
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