| Name | Birth date | Death date | Marriage date | Spouse | Birth location | Death location |
| O'BRIEN, Kids | | | | | | |
| O'BRIEN, Kitty | 1804 | 1886 | | MCGRATH, James | Ireland | |
| O'BRIEN, Margaret | | Infant | | | | |
| O'BRIEN, Margaret | 1801 | 2/1/1903 | | BURNS, Thomas | County Clare, Ireland | Dawn Twp |
| O'BRIEN, Mary | | Abt. 1847 | | | | At sea |
| O'BRIEN, Michael | | | | | | |
| O'BRIEN, Michael | Abt. 1858 | Infant | | | | |
| O'BRIEN, Michael J. | | Infant | | | | |
| O'BRIEN, Nancy | | | | | | |
| O'BRIEN, Sarah | 1851 | 1/2/1938 | 1/12/1875 | MASON, Eugene | Plympton Township | |
| O'BRIEN, Son | | | | | | Infant |
| O'CONNER, Anne Lane | 1879 | 1945 | | ENRIGHT, Michael L. | | |
| O'DONNELL, Angeline Cecilia | 2/23/1903 | 8/21/1991 | | BAUGHAN, Robert | 10 Concession Plympton Lambton Ontario | Forest Ontario, Beechwood RC Cemetery |
| O'DONNELL, Anne Frances | 3/12/1903 | 8/2/1991 | 11/19/1931 | MCCLELLAN, Walter William | L12 Concession 12 Plympton Lambton | Detroit Michigan |
| O'DONNELL, Baby | 2/27/1979 | | | | | |
| O'DONNELL, Beatrice Helen | 10/22/1910 | | 1935 | PROUT, John | 10 Concession Plympton Lambton Ontario | |
| O'DONNELL, Bernice Helen | 11/24/1906 | | 5/6/1943 | MCCANN, Francis G. | | |
| O'DONNELL, Charles | 10/20/1877 | 11/15/1957 | | | Plympton Township, Lambton County, Ontario | Vancouver British Columbia |
| O'DONNELL, Charles Frederick | 1/5/1912 | 6/26/1981 | 6/29/1945 | ORENDORFF, Irene (Mary Irene ) | London, Ontario | London, Ontario |
| O'DONNELL, Cheryl | 3/1/1963 | | | | | |
| O'DONNELL, Cindy | 4/1/1964 | | | | | |
| O'DONNELL, Connie | Unknown | | | | | |
| O'DONNELL, Darrell | 11/11/1974 | | | | Fox Creek | |
| O'DONNELL, Deanna | 6/29/1938 | | 4/12/1958 | HOGAN, William | | |
| O'DONNELL, Deborah | | | | | | |
| O'DONNELL, Douglas | | | | | | |
| O'DONNELL, Edward | 8/9/1879 | | 6/6/1908 | BIBBY, Agnes | l25 Concession 13 Plympton Lambton Co, Ontario | Edmonton Alberta |
| O'DONNELL, Elaine | 1905 | 2/16/1905 | | | 10 Concession Plympton Lambton Ontario | Forest Ontario, Beechwood RC Cemetery |
| O'DONNELL, Eleanor Bernadette | 11/27/1900 | | 7/5/1930 | WHALING, Arthur A. | L12 Concession 12 Plympton Lambton | |
| O'DONNELL, Elizabeth Ellen | 1/8/1875 | 5/21/1940 | 11/2/1901 | LEONARD, James | Lot 25, Con 13 Plympton Lambton Co, Ontario | Detroit, Michigan |
| O'DONNELL, Estelle | | | | | | |
| O'DONNELL, Francis Vincent | 6/7/1907 | 5/14/1909 | | | Plympton Township, Lambton County, Ontario | Forest Ontario |
| O'DONNELL, Frank | | | | | | |
| O'DONNELL, Fredrick | 7/14/1947 | | 8/18/1971 | MAREAUX, Rejane | London, Ontario | |
| O'DONNELL, Gizelle | 4/21/1956 | | 12/30/1977 | HEMMINGS, Robert | St. Laurent, Quebec | |
| O'DONNELL, Gladys | 12/19/1912 | | | PROUT, Ellwood | 10 Concession Plympton Lambton Ontario | |
| O'DONNELL, Gweneviere | | | | | | |
| O'DONNELL, Hilda | | | | | | |
| O'DONNELL, Hilda Irene | 1915 | 7/15/1981 | 6/10/1942 | GALLAGHER, John | Plympton Township, Lambton County, Ontario | London Ontario |
| O'DONNELL, James | | | | | | |
| O'DONNELL, James | 1835 | 9/17/1908 | 2/21/1871 | HATTON, Mary Ann | Knockaderry, County Limerick, Ireland | Forest Ontario Canada |
| O'DONNELL, James Elmo | 12/29/1899 | | | | | |
| O'DONNELL, James Francis | 6/12/1867 | 3/3/1938 | 6/7/1899 | MCQUADE, Ellen Frances | Lot 25, Con 13 Plympton Township Lambton County | Camrose, Alberta |
| O'DONNELL, James M. | 3/22/1871 | | | | | |
| O'DONNELL, James Michael | 3/21/1868 | 11/21/1942 | 11/19/1902 | MASON, Mary Ann | Plympton Township, Lambton County, Ontario | Forest Ontario |
| O'DONNELL, James Vincent | 1/18/1911 | 1/25/1963 | 11/23/1935 | FRASER, Rhea | Plympton Township | Forest Ontario |
| O'DONNELL, Jamie | 8/22/1966 | | | | | |
| O'DONNELL, Jean Michel | 3/28/1973 | | | | Alberta | |
| O'DONNELL, John | 1794 | 9/10/1875 | | MADAGEN, Bridget | Knockaderry, Limerick Co. Ireland | Forest Ontario, Beechwood Cemetery |
| O'DONNELL, John | 5/17/1875 | 4/26/1954 | 2/5/1908 | GUIFOYLE, Margaret Theresa | Plympton Township, Lambton County, Ontario | St. Mary's Hospital, London, Onterio |