| Last Name | First Name | Father | Mother | Book | Roll # | Page | Year | |
| Oakley | Male | William | May | M2-H9 | 9 | 13 | 1911 | |
| Oard | Betty Joan | Roy O. | Eva Lorene Phelps | H-6 | 12 | 60 | 1929 | |
| Oard | Jackie Leroy | Roy | Eva Lorine Phelps | H-6 | 12 | 101 | 1931 | |
| O'Brien | Michael | Major | Mary Lamb | H-2 | 10 | 68 | 1909 | |
| O'Bryan | Eugene Elmer | Hiram | Alma Kemper | H-5 | 11 | 70-71 | 1922 | |
| O'Bryan | Robert Lee | Hiram C. | Alma E. Kemper | H-5 | 11 | 164-5 | 1924 | |
| Ocheltree | Charles Richard | Cletus | Geraldine Jackson | H7 | 12 | 84 & 85 | 1935 | |
| Ocheltree | Elma Doris | Charles | Dessie Stout | H-2 | 10 | 107 | 1911 | |
| Ocheltree | Elsie Marie | Charles W. | Dessa Stout | H-4 | 11 | 36 | 1917 | |
| Ocheltree | Female | Charles | Stout | H-2 | 10 | 4 | 1906 | |
| Ocheltree | Frank O. | Clean | Stout | H-2 | 10 | 42 | 1908 | |
| Ocheltree | Male | Charles | Stout | H-2 | 10 | 4 | 1906 | |
| Ocheltree | Martha Grace | Charles | Elma Dessie Stout | H-4 | 11 | 9 | 1916 | |
| Ocheltree | Olin B. | Fenten Byerly | Elsie Marie Ocheltree | H7 | 12 | 98-99 | 1936 | |
| Ocheltree | Raymond | Frederic McMasters | Elma Davis Ocheltree | H-6 | 12 | 85 | 1930 | |
| Odell | Frank William | Fred | Margaret Crooks | H-4 | 11 | 5 | 1915 | |
| Odell | Leonard Edgar | Roy | Moore | H-2 | 10 | 78 | 1910 | |
| Odle | Velori M. | William | Murtie Werner | H-17 | 9 | 1 | 1908 | |
| Ogden | Albert Hugh | Lorenzo D. | Minnie Lewis | H-8 | 12 | 38 | 1898 | |
| Ogden | Margaret Beatrice | John Charles | Ann Roxberry | R 1-H 5 (1907-1913) | 7 | 2 | 1908 | |
| Ogden | Vera Josephine | Riley B. | Anna May Richie | H-3 | 11 | 1 | 1910 | |
| Ogden | Margaret Ethel | Henry | Josephine O'Rourke | H-8 | 12 | 42 | 1894 | |
| Ogdon | William | John C. | Anna Roxby | H-8 | 12 | 53 | 1900 | |
| Ogle | Alice Vivian | Frank | Marie Gossett | H-6 | 12 | 14 | 1926 | |
| Ogle | Edna Noline | Joseph | Susie McKinzie | H-12 | 7 | 15 | 1915 | |
| Ogle | Jackie Lee | Benjamin F. | Marie Gossett | H-13 | 8 | 20 | 1935 | |
| Ogle | James Franklin | Frank | Marie Gossett | H-6 | 12 | 56 | 1928 | |
| Ogle | Margaret Louise | Frank | Marie Gossett | H-5 | 11 | 226-7 | 1925 | |
| Ogle | William Nolen | William | Aletha Nichols | H-4 | 11 | 92 | 1919 | |
| O'Hair | Margaret Ann | Earl | Stella Singleton | H-2 | 10 | 91 | 1910 | |
| Ohaver | Francis Lois | Frank | Claris Marjery Nevins | H-4 | 11 | 65 | 1918 | |
| Ohaver | Keith | Ernest | Sarah Virginia Humphries | H-11 | 9 | 28 | 1908 | |
| Ohaver | Mary Virginia | Frank | Marjorie Nevins | H-4 | 11 | 27 | 1916 | |
| O'Haver | Naomi Ellen | Frank T. | Clarice Marjorie Nevins | H-6 | 12 | 108 | 1932 | |
| Ohaver | Dorthy Jean | William | Lydia Cox | H-12 | 7 | 15 | 1916 | |
| O'Hern | Leo Faris | John | Myrtle Faris | H-3 | 11 | 82 | 1914 | |
| O'Hern | Male | Cornelius | Lena Thomas | H-4 | 11 | 119 | 1920 | |
| O'Hern | Raymond Frederick | Connie | Lena Martin | H-5 | 11 | 150-1 | 1923 | |
| Okes | Loren | Clarence | Mary E. White | H-4 | 11 | 30 | 1916 | |
| Oldham | Kathleen | Arthur | Beulah Marie Bekelheimer | H-8 | 12 | 43 | 1941 | |
| Olds | Harold Gene | John | Violet Irwin | H-6 | 12 | 93 | 1931 | |
| Olds | Marvin Ellis | Hary | Maude Railsback | R2-H6 | 8 | 19 | 1923 | |
| Olds | Mildred Francis | Harry | Maude Railsback | R2-H6 | 8 | 13 | 1918 | |
| Olds | Wilbur Clyde | Harry | Maude Railsback | R2-H6 | 8 | 16 | 1920 | |
| Olds | Betty Jane | John | Violet Irwin | H7 | 12 | 30&31 | 1933 | |
| Ollie | Hubert Carrol | William R. | Jessie Eva Skelton | H-4 | 11 | 33 | 1917 | |
| Ollie | Thomas Foster | Herman | Levina Hester | H-4 | 11 | 72 | 1918 | |
| Olson | Norma Jean | Harry J. | Pauline Davis | H-8 | 12 | 70 | 1942 | |
| Olson | Walter Frank | Harry W. | Mary Irene Shouse | H-12 | 7 | 14 | 1915 | |
| Orahood | Martha Geneve | Seward | Grace McIntosh | H-4 | 11 | 105 | 1920 | |
| Orahood | Mary Louise | Seward L. | Mary Crooks | H-6 | 12 | 63 | 1929 | |
| Orahood | Stanley Dean | Seward | Grace McIntosh | H-3 | 11 | 35 | 1912 | |
| Orlea | Aletha Josephine | Alexander | Ollie Belle Lane | H-6 | 12 | 55 | 1928 | |
| Orlea | Artholia Rose | Charles | Bertha B. Cruse | H-6 | 12 | 57 | 1928 | |
| Orlea | Charles Robert | Charles | Bertha B. Cruse | H7 | 12 | 64 & 65 | 1934 | |
| Orlea | Elizabeth | Charles | Bertha Cruse | H-6 | 12 | 111 | 1932 | |
| Orlea | Hazel Marie | Charles | Bertha Cruse | H-5 | 11 | 124-125 | 1923 | |
| Orlea | Malcolm Norris | Alexander | Ollie Belle Lane | H-6 | 12 | 113 | 1932 | |
| Orndorff | Max Ferrel | Clyde | Eva Niccum | H-7 | 12 | 160-1 | 1938 | |
| Orr | James Albert | Robert | Ethel Moore | H-4 | 11 | 55 | 1917 | |
| Orvis | Kenneth William | Lawrence | Effie Wallace | H-1 | 10 | 24 | 1905 | |
| Orzehaski | Robert Lyle | Joseph | Irene G. Davis | H-17 | 9 | 7 | 1933 | |
| Osborn | Carolyn June | Lemuel | Frances Branson | H7 | 12 | 12&13 | 1933 | |
| Osborn | Edna Marie | Ralph | Mildred Manley | H-4 | 11 | 89 | 1919 | |
| Osborn | Eva Rebecca Jane | Lemuel | Frances Branson | H-6 | 12 | 89 | 1931 | |
| Osborn | Helen Marie | Oliver | Lillie Kidwell | H-6 | 12 | 14 | 1926 | |
| Osborn | Male | Guy | R. Reeves | M2-H9 | 9 | 8 | 1910 | |
| Osborn | Oliver, Jr. | Oliver O. | Lillie Kidwell | H-5 | 11 | 156-7 | 1924 | |
| Osborn | Male | Luther | Mary Lindley | H-1 | 10 | 39 | 1906 | |
| Osborn | Ralph | Lem | Annis Skeeters | 7 | 4 | 1901 | ||
| Osborn | Richard Hugh | Lemuel | Annis Sketers | M1-H8 | 9 | 6 | 1905 | |
| Osborn | Richard Hugh | Lem | Annis Skeeters | H-1 | 10 | 28 | 1905 | |
| Osborne | Alan Reid | L. Lowell | Marjorie Pickett | H7 | 12 | 52&53 | 1934 | |
| Osborne | Catherine | Virgil | Tinder | H-2 | 10 | 17 | 1907 | |
| Osborne | Male | Morton | --Hays | H-11 | 9 | 26 | 1906 | |
| Osborne | Mary Edna | John S. | Jennie B. Lambert | H-7 | 12 | 242-43 | 1892 | |
| Osborne | Robert Linsey | Monroe | Eudora May Johnson | H-8 | 12 | 15 | 1900 | |
| Osborne | Roy Hubert | John S. | Jennie B. Lambert | H-8 | 12 | 1 | 1896 | |
| Osborne | Warren Gilbert | William | Mary E. Thompson | H-8 | 12 | 6 | 1891 | |
| Osborne | Female | Luther | Lindley | H-2 | 10 | 20 | 1907 | |
| Osborne | Frances Mae | Charles A. | Mary Lorene Wilson | H-8 | 12 | 40 | 1902 | |
| Oswalt | Kathryn | Samuel H. | Sarah P. | H-1 | 10 | 7 | 1903 | |
| Ott | Alice V. | W.G. | Rebecca Berry | H-11 | 9 | 29 | 1909 | |
| Ott | Juliet Catherine | Claude | Marcia Strouse | H-3 | 11 | 37 | 1913 | |
| Ott | Robert Cullen | William C. | Rebecca Berry | H-12 | 7 | 5 | 1911 | |
| Ott | Sarah Francis | Dick H. | Estella Morris | H-12 | 7 | 5 | 1911 | |
| Overman | Dorothy Susan | V.L. | Lough | H-2 | 10 | 64 | 1909 | |
| Overman | J. Parke | V.Lee | Minnie Lough | H-8 | 12 | 15 | 1899 | |
| Overpeck | Brooks Thompson | Hervey | Blanche Thompson | H-3 | 11 | 103 | 1915 | |
| Overpeck | Carl | Fred | Grace Barnaby | H-8 | 12 | 54 | 1904 | |
| Overpeck | Charles Wilson | Frank | Myrtle Holmes | H-4 | 11 | 19 | 1916 | |
| Overpeck | Clay Eugene | Elias | Mary Miller | H-2 | 10 | 63 | 1909 | |
| Overpeck | Clifford Dean | Arthur | Dora Ethel Pefley | H-5 | 11 | 52-53 | 1922 | |
| Overpeck | Cynthia Fay | Perley | Julia Anderson | H-3 | 11 | 16 | 1912 | |
| Overpeck | Doloris May | Bryan | Della Marlow | H-6 | 12 | 60 | 1929 | |
| Overpeck | Dorene Adair | Bryan | Lucy Ardella Marlow | H-5 | 11 | 156-7 | 1924 | |
| Overpeck | Doris Ellen | Charles | Maxine Myers | H8 | 12 | 90 | 1944 | |
| Overpeck | Dorothy Lavon | Edward | Ethel Miller | H-2 | 10 | 45 | 1908 | |
| Overpeck | Dorothy Lucille | Ocal | Levia Spurr | H-4 | 11 | 12 | 1916 | |
| Overpeck | Edgar Pearl | Lawrence | Sylvia E. Nevins | H-4 | 11 | 96 | 1919 | |
| Overpeck | Ester | Fred | Grace Barnaby | H-3 | 11 | 17 | 1912 | |
| Overpeck | Eugene Lollis | Perley | Julia Anderson | H-8 | 12 | 6 | 1940 | |
| Overpeck | Female | Frank L. | Myrtle H. | H-1 | 10 | 22 | 1904 | |
| Overpeck | Female | Fred | Grace Barnaby | H-3 | 11 | 45 | 1913 | |
| Overpeck | Female | Ora | Elizabeth Summers | H-5 | 11 | 216-17 | 1925 | |
| Overpeck | Frederick Russell | Arthur | Dora Pefley | H-4 | 11 | 100 | 1919 | |
| Overpeck | Geneva Hortense | Harold | Ruby Pence | H-5 | 11 | 54-55 | 1922 | |
| Overpeck | Henrietta Nadine | Henry | Agnes Bornto | H-4 | 11 | 53 | 1917 | |
| Overpeck | Homer C. | Frank L. | Myrtle A. Holmes | H-8 | 12 | 36 | 1897 | |
| Overpeck | Howard Summers | Ova | Elizabeth Myrtle Summers | H-5 | 11 | 70-71 | 1922 | |
| Overpeck | Ilena Emily | Lawrence | Syvlia Ethel Nevins | H-6 | 12 | 27 | 1927 | |
| Overpeck | Inez Lucretia | Lawrence | Sylvia Nevins | H-6 | 12 | 96 | 1931 | |
| Overpeck | Ivan Paul | Cleo | Elna Marlar | H-5 | 11 | 152-3 | 1923 | |
| Overpeck | Izetta May | Ocal | Lenia L. Spurr | R2-H6 | 8 | 20 | 1923 | |
| Overpeck | Jackie D. | Charles W. | Maxine Myers | H-8 | 12 | 70 | 1941 | |
| Overpeck | Jessie Maxine | Arthur | Dora Pefley | H-4 | 11 | 71 | 1918 | |
| Overpeck | Joseph Blacketer | Edward | Blanche Blacketer | H-6 | 12 | 50 | 1928 | |
| Overpeck | Lawrence, Jr. | Lawrence | Sylvia Nevins | H-5 | 11 | 150-1 | 1923 | |
| Overpeck | Leonard Harley | Arthur | Dora Ethel Pefley | H-4 | 11 | 31 | 1916 | |
| Overpeck | Malcolm Gale | Ocal | Livia Spurr | R2-H6 | 8 | 30 | 1931 | |
| Overpeck | Male | Fred | Barnaby | H-2 | 10 | 51 | 1908 | |
| Overpeck | Male | Arthur | Dora Pefley | H-4 | 11 | 10 | 1916 | |
| Overpeck | Male | Lawrence | Sylvia Nevins | H-5 | 11 | 232-3 | 1925 | |
| Overpeck | Margaret Fauneil | Alva | Grace Gertrude Williams | H-5 | 11 | 2,3 | 1920 | |
| Overpeck | Mary Frances | Lawrence | Nevins | H-2 | 10 | 89 | 1910 | |
| Overpeck | Mary Louise | Arthur | Dora Ethel Pefley | H-5 | 11 | 184-5 | 1924 | |
| Overpeck | Morris Eugene | Arthur | Dora Pefley | H-6 | 12 | 114 | 1932 | |
| Overpeck | Nancy Ione | Kenneth | Mildred Martin | H-7 | 12 | 196-7 | 1939 | |
| Overpeck | Owen Fox | Marion A. | Muston | H-2 | 10 | 14 | 1907 | |
| Overpeck | Paul | A. | Ellen H. | H-1 | 10 | 21 | 1904 | |
| Overpeck | Paul Holmes | Frank | Myrtle Holmes | H-8 | 12 | 6 | 1899 | |
| Overpeck | Paul Owen | Arthur | Dora Peffley | H-6 | 12 | 25 | 1927 | |
| Overpeck | Paul Wayne | Paul H. | Ione Wilson | M2-H9 | 9 | 35 | 1921 | |
| Overpeck | Perley Hugh | Thomas H. | Cynthia Ann Ball | H-7 | 12 | 238-39 | 1888 | |
| Overpeck | Phyllis Maxine | Henry W. | Sadie E. Crawley | R2-H6 | 8 | 18 | 1922 | |
| Overpeck | Rachel Estelle | Frank L. | Homes | H-2 | 10 | 14 | 1907 | |
| Overpeck | Rose Mary | Clay | Floy Rose | H7 | 12 | 62 & 63 | 1934 | |
| Overpeck | Virginia Irene | Alva | Gertrude Williams | H-4 | 11 | 81 | 1919 | |
| Overpeck | Walter Clyde | Eddie | Blanche Blacketer | H-5 | 11 | 162-3 | 1924 | |
| Overpeck | Wilbert Lowell | Lawrence E. | Sylvia E. Nevins | H-6 | 12 | 50 | 1928 | |
| Overpeck | Winoa Bella | Ocal O. | Laurabelle Spurr | R2-H6 | 8 | 31 | 1933 | |
| Ovivian | Robert Harold | William H. | Nettie Brown | H7 | 12 | 88 & 89 | 1935 | |
| O'Vivian | Billie Jane | William | Martha Jane Taylor | H8 | 12 | 118 | 1949 | |
| O'Vivian | James Howard | Harvey H. | Nettie Brown | H-6 | 12 | 14 | 1926 | |
| O'Vivian | Madonna Joy | William H. | Nettie Elizabeth Brown | H-8 | 12 | 57 | 1941 | |
| Ovivion | Nellie Virginia | William H. | Nettie E. Brown | H-13 | 8 | 18 | 1934 | |
| Owen | Arthur Leverette | Elmer L. | Ruby Myers | H-7 | 12 | 240-41 | 1921 | |
| Owen | Harold | Clarence | Biddie Parvis | H-8 | 12 | 28 | 1904 | |
| Owen | Hellen | Fred | Hellen Bannon | H-17 | 9 | 3 | 1914 | |
| Owen | Male | Horace | Ethel Robins | H-2 | 10 | 47 | 1908 | |
| Owens | James Lee, Jr. | James Lee | Minta Eliza Wall | R 1-H 5 (1907-1913) | 7 | 4 | 1910 | |
| Owens | John | Edmund | Bertha B. Bugher | H-6 | 12 | 91 | 1931 | |
| Owens | Mary Virginia | David | Nancy Ott Hockett | H-4 | 11 | 65 | 1918 | |
| Owens | Stanley Dane | Buster | Dorothy Lucille Stanley | H-6 | 12 | 88 | 1930 | |
| Owens | Tommy | Edmund | Bertha Bugher | H7 | 12 | 10&11 | 1933 | |
| Owens | Walter Vernon | Walter | Lulie Hughes | B1-H13 | 10 | 3 | 1908 | |
| Owens | Forest Fountain | James | Nellie H. | H-3 | 11 | 51 | 1913 | |
| Owens | Helen Pauline | Fred | Sarah Helen Bannon | H-3 | 11 | 63 | 1914 | |
| Owens | June Marie | David | Nanacy Ann Hockett | H-5 | 11 | 48-49 | 1921 | |