- O'Dell
-
Bill B: 1909, D: 1988Charlotte B: 1788, D: 1869Connard B: 1903, D: 1995Connard Jr. B: 1925, D: 1988Constance B: 1903, D: 1993Dewey B: 1899, D: 1967Jake B: 1903, D: 1995Katherine B: 1911, D: 1993Lucille C. (Mrs.) (née Syfert) D: 1986Madonna D: 1941Merle B: 1900, D: 1978Merle Jr. B: 1925, D: 1977Sarah (Mrs.) (née Smith) B: 1905, D: 1994Thomas Aden B: 1907, D: 1987Tilmon B. B: 1905, D: 1994Tim B: 1905, D: 1994William Taft B: 1909, D: 1988Winnifred Leona (Mrs.) (née Wiley) B: 1910, D: 1976
- O'Donnell
- O'Hair
-
Eleanor Nellie B: 1797, D: 1855
- O'Hara
-
Mary Alice B: 1847
- O'Laughlin
- O'Malley
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Alice C. (Mrs.) B: 1926, D: 1997Irvin J. B: 1915, D: 1999Pat B: 1915, D: 1999Robbie B: 1967, D: 2000Robert Dean B: 1967, D: 2000
- O'Meara
- O'Neal
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Clarice B: 1913, D: 1994Connie Lou B: 1946, D: 2018Frank B: 1919, D: 1988Grand Clair B: 1913, D: 1994Ida Victoria (Mrs.) (née Clinton) B: 1903, D: 1996Iva Mae (Mrs.) (née Warden) B: 1935, D: 2008Jesse James B: 1898, D: 1981Lizzie B: 1867, D: 1944Lucille (Mrs.) (née LeMaster) B: 1924, D: 2000Margaret Ann B: 1820, D: 1886
- O'Neil
-
Catharina B: 1783Catharina B: 1785Elizabeth B: 1793James B: 1787Johannes B: 1791John B: 1756
- O'Neill
- O'Rear
- O'Rielley
- O'Sullivan
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Katie B: 1888, D: 1956
- O'Toole
- Oaikonom
- Oakes
-
Emily (Mrs.) (née Swayze) B: 1858, D: 1909Grace Ethel B: 1882Hammon Burlingham B: 1838, D: 1909
- Oakey
-
Blaine R. B: 1916, D: 1995
- Oakley
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Barbara Joan B: 1932, D: 2015Iris (Mrs.) (née Martenson) B: 1902, D: 1947Lester Earl B: 1897, D: 1962
- Oaks
-
Elizabeth B: 1769, D: 1853