16 surname listings matched your request.

Surname (Time Period) Area of Ontario
O'BRIEN (1800s) Peterborough County
O'CALLAGHAN (1670-1940) All of Ontario
O'CONNOR (1800s) Peterborough County
O'DELL (1800-1870) All of Ontario
O'DONNELL (1870-1925) Etobicoke Twsp., Peel County
O'HEARN (1854-1901) Grey, Irish Lake, Glenelg Township
O'LEARY (1800-1900) Middlesex County
O'LEARY (1860-1910) London/Middlesex Co, Stratford/Perth Co.
O'NEIL (1850-1950) Lambton County
OAG (1800s-present) SW Ontario
OGILVIE (1800-2000) SE Ontario
OLMSTEAD (1850=1950) Grey
ORR (1820-1900) Pakenham, Lanark
OSBORN (1800-1850) Wellington County, Eramosa Twp.
OSBORNE (1830 - 1900) Prince Edward County
OSTER (1700-2006) York County

     

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