- O'Quinn
-
Treasa b. 1817, d. 1883
- O'Regan
-
Margaret b. 1866
- O'Riley
-
Nellie Alice b. 1889, d. 1931
- O'Roddy
-
Margaret Anna b. 1842, d. 1918
- O'Sullivan
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Mary Leona (Mrs.) (Wells) b. 1901, d. 1996
- Oak
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Betsey b. circa 1782, d. 1821Betsy b. circa 1782, d. 1821Elizabeth b. 1782, d. 1821
- Oakes
-
Elizabeth 'Bettie' (Mrs.) (Wells) b. 1849, d. 1903Elsie May b. circa 1870Louisa b. 1840, d. 1923Mary Louise (Mrs.) (Wells) b. 1870, d. 1929Mercy L b. 1824, d. 1907Olive (Mrs.) (Wells) b. 1820
- Oakley
-
Mary ''Polly'' b. 1782, d. 1864Polly 'Mary' b. 1782, d. 1864Susan b. 1820, d. after 1856
- Oaks
-
Elsie b. circa 1870Grace (Mrs.) (Wells) b. circa 1905Mercy b. 1824, d. 1907
- Oar
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Mary b. 1717/18, d. 1759
- Oates
-
Elizabeth b. 1867, d. 1937
- Oatley
-
Eliza (Mrs.) (Welles) b. 1809Eliza Ann (Mrs.) (Wells) b. 1812
- Oats
-
Mary b. 1740, d. 1850Nancy b. 1767, d. 1862
- Obeail
-
Ermal b. 1900, d. 1966
- Oben
-
Mary Rose b. circa 1850Rosa Mary b. 1842, d. 1916
- Ober
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Tina b. 1818, d. 1898Tryphena b. 1818, d. 1898
- Oberhelman
-
Zasel Olive (Mrs.) (Wells) b. 1916, d. 2005
- Obermeyer
-
Esther (Mrs.) (Hilge) b. 1900, d. 1991
- Oberst
-
Ellen b. 1841
- Obey
-
Sarah b. circa 1760
- Obon
-
Mary b. circa 1840
- Obrian
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Amanda (Mrs.) (Wells) b. circa 1835
- Oburn
-
Rosa Mary b. 1842, d. 1916
- Ochsner
-
Emily b. 1890, d. 1975
- Oddette
-
Grace b. 1889, d. 1946
- Odeakirk
-
Dorothy b. circa 1915
- Odell
-
Hannah b. 1754, d. 1838Harriet (Mrs.) (Curtiss) b. circa 1840, d. 1896Lottie Pearl b. 1870Margaret May (Mrs.) (Wells) b. 1909, d. 1979
- Oderkirk
-
Viola Naomi (Mrs.) (Wells) b. 1860, d. 1935
- Odette
-
Grace Mary b. 1889, d. 1946
- Odom
-
Eunice Amanda (Mrs.) (Wells) b. 1894, d. 1969Rebecca Ann b. 1856, d. 1914
- Odum
-
Dora b. circa 1871
- Oernst
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Julia E (Mrs.) (Wells) b. 1836, d. 1927
- Offutt
-
Alma b. 1898, d. 1978
- Ogan
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Margaret Ann b. 1869, d. 1945Parthenia Catherine b. 1838, d. 1875
- Ogburn
-
Marietta F b. circa 1875
- Ogden
-
Lizzie 'Or Laura' (Mrs.) (Wells) b. 1879Nora b. circa 1890Sarah Ann (Mrs.) (Wells) b. circa 1817, d. circa 1880
- Ogee
-
Margaret b. circa 1814
- Ogger
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Hazel (Mrs.) (Wells) b. 1890, d. 1977
- Ogle
-
Dainie A b. 1893, d. 1979Frances Leoda b. 1914, d. 1968Temperance (Mrs.) (Wells) b. 1822
- Oglesby
-
Malinda b. 1825, d. 1911
- Ohare
-
Elizabeth (Mrs.) (Wells) b. circa 1817
- Oke
-
Matilda Ingrid (Mrs.) (Johnson) b. 1872, d. 1953
- Okoniewski
-
Carolyn b. 1939, d. 2011
- Olcott
-
Anna Maria b. 1799Clara (Mrs.) (Deming) b. 1763, d. 1835Mary (Mrs.) (Blackleach) b. circa 1662
- Oldershaw
-
Ann Stevens b. 1838, d. 1923
- Oldfield
-
Itura (Mrs.) (Wells) b. 1856
- Oldham
-
Amanda b. 1857, d. 1896Anna Pearl b. 1886, d. 1968Eula Dessie b. 1897, d. 1982Mary (Mrs.) (Wells) b. circa 1780Tabitha b. circa 1847