Index to the Dictionary of North Carolina Biography
Created by the Staff of the Olivia Raney Library
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| Last, First Name | Co./Country of Birth | Resided | Life Span (if Known) |
| Oates, John Alexander | Sampson Co. | Sampson Co. | 1870 - 1958 |
| Oates, John Alexander | Cumberland Co. | 1870 - 1958 | |
| O'Berry, Annie Land | Edgecombe Co. | Edgecombe Co. | 1885 - 1944 |
| O'Berry, Annie Land | Wayne Co. | 1885 - 1944 | |
| O'Brien, William Thomas | Lynchburg, Virginia | Durham Co., Durham | 1854 - 1906 |
| Ochiltree, William Beck | Cumberland Co. | moved to Florida | 1811 - 1867 |
| Odell, James Alexander | Randolph Co. | Davidson Co. | 1841 - 1930 |
| Odell, James Alexander | Guilford Co. | 1841 - 1930 | |
| Odell, John Milton | Randolph Co. | Randolph Co. | 1831 - 1910 |
| Odell, John Milton | Cabarrus Co., Concord | 1831 - 1910 | |
| Odell, John Milton | Guilford Co. | 1831 - 1910 | |
| Odum, Howard Washington | Bethlehem, Georgia | Orange Co. | 1884 - 1954 |
| Oertel, Johannes Adam Simon | Nuvemberg, Bavaria | Caldwell Co., Lenoir | 1823 - 1909 |
| Oertel, Johannes Adam Simon | Burke Co., Morganton | 1823 - 1909 | |
| O'Hara, James Edward | New York, New York | Wayne Co. | 1844 - 1905 |
| O'Hara, James Edward | Halifax Co. | 1844 - 1905 | |
| O'Hara, James Edward | Craven Co. | 1844 - 1905 | |
| O'Kelly, Berry | Orange Co. | Wake Co. | ca. 1861 - 1931 |
| O'Kelly, James | Ireland | Chatham Co. | pre 1741 - 1826 |
| Olds, Frederick Augustus | North Carolina | Orange Co. | 1853 - 1935 |
| Olds, Frederick Augustus | Wake Co. | 1853 - 1935 | |
| Olive, Eugene Irving | Wake Co. | Wake Co. | 1890 - 1968 |
| Olive, Eugene Irving | Cumberland Co. | 1890 - 1968 | |
| Olive, Eugene Irving | Forsyth Co. | 1890 - 1968 | |
| Olive, Hubert Ethridge, Sr. | Randolph Co., Randleman | Randolph Co. | 1895 - 1972 |
| Olive, Hubert Ethridge, Sr. | Davidson Co. | 1895 - 1972 | |
| Olmsted, Denison | East Hartford, Connecticut | Orange Co. | 1791 - 1859 |
| Ormond, Wyriot, Jr. | Beaufort Co. | Beaufort Co., Bath | d. 1773 |
| Ormond, Wyriot, Sr. | England | Beaufort Co. | ca. 1707 - ca. 1758 |
| Orr, Louis | Hartford, Connecticut | Wake Co., Raleigh | 1879 - 1966 |
| Osborn, Charles | Guilford Co. | Guilford Co. | 1775 - 1850 |
| Osborne, Adlai | New Jersey | Rowan Co. | 1744 - 1814 |
| Osborne, Adlai | Iredell Co. | 1744 - 1814 | |
| Osborne, Alexander | New Jersey | Anson Co. (now Iredell) | 1709 - 1776 |
| Osborne, Alexander | Rowan Co. | 1709 - 1776 | |
| Osborne, Edwin Augustus | Lawrence Co., Alabama | Rowan Co. | 1832 - 1926 |
| Osborne, Edwin Augustus | Iredell Co. | 1832 - 1926 | |
| Osborne, Edwin Augustus | Mecklenburg Co. | 1832 - 1926 | |
| Osborne, Francis (Frank) Irwin | Mecklenburg Co. | Mecklenburg Co. | 1803 - 1920 |
| Osborne, James Walker | Rowan Co. | Mecklenburg Co. | 1811 - 1869 |
| Osborne, James Walker | Mecklenburg Co. | moved to New York | 1859 - 1919 |
| Osborne, John Chevor | Middletown, Connecticut | Craven Co. | d. 1819 |
| Outlaw, David | Bertie Co. | Bertie Co. | 1806 - 1868 |
| Outlaw, David | Wake Co., Raleigh | 1806 - 1868 | |
| Outlaw, George | Bertie Co. | Bertie Co. | 1771 - 1825 |
| Overman, Lee Slater | Rowan Co. | Rowan Co. | 1854 - 1930 |
| Owen, Allen Ferdinand | Wilkes Co. | moved to Georgia | 1816 - 1865 |
| Owen, Banjamin Wade | Moore Co. | Moore Co. | 1904- 1933 |
| Owen, Guy | Bladen Co. | Bladen Co. | 1925 - 1981 |
| Owen, Guy | Wake Co., Raleigh | 1925 - 1981 | |
| Owen, James | Bladen Co. | Cumberland Co. | 1784 - 1865 |
| Owen, James | New Hanover Co. | 1784 - 1865 | |
| Owen, John | Bladen Co. | Bladen Co. | 1787 - 1841 |
| Owen, John Fletcher | Sampson Co. | Sampson Co. | 1895 - 1976 |
| Owen, John Fletcher | Wake Co., Raleigh | 1895 - 1976 | |
| Owen, Thomas | Chester Co., Pennsylvania | Granville Co. | 1735 - 1806 |
| Owen, Thomas | Bladen Co. | 1735 - 1806 | |
| Owen, William | Unknown | Beaufort Co. | d. 1734 |
| Owen, William Hayes | Virginia | Granville Co. | ca. 1802 - ca. 1877 |
| Owen, William Hayes | Wake Co., Wake Forest | ca. 1802 - ca. 1877 | |
| Owen, William Hayes | Orange Co. | ca. 1802 - ca. 1877 | |
| Oxley, Lawrence Augustus | Boston, Massachusetts | Wake Co., Raleigh | 1882 - 1973 |