Names |
| Oakes, Frederick (1781-1855) |
| Oakes, Frederick (1815-1869) |
| Oakes, William (1812- ) |
| Olin, Frank G. (1861- ) |
| Olin, John G. (1836-1928) |
| Olin, John S. (1871- ) |
| Olmsted, Chauncey North (1831-1882) |
| Olmsted, George (1817-1886) |
| Olmsted, George Petrie (1829-1909) |
| Olmsted, George Weed (1851- ) |
| Olmsted, Henry (1823-1892) |
| Olmsted, Nathaniel (1785-1860) |
| Olney, Charles Henry (1859- ) |
| Olney, Elam Ward (1802-1862) |
| Olney, Stephen William (1834-1919) |
| Orcutt, Wales Charles (1837-1905) |
| Ordway, Henry Morrill (1825-1907) |
| Ordway, Henry Wood (1862- ) |
| Ormsby, Henry (abt 1807- ) |
| Osborn, Charles (1792-1869) |
| Osborn, Edward A. (1830- ) |
| Osborn, William (1801-1884) |
| Osborn, William T. (1832- ) |
| Osgood, Alfred (1809- ) |
| Osgood, Augustus B. (1840- ) |
| Osgood, Charles H. (1849- ) |
| Osgood, Charles S. (1873- ) |
| Osgood, Charles W. (1859- ) |
| Osgood, Henry A. (1819-1905) |
| Osgood, James Kendrick (1848-1909) |
| Osgood, Marion Hudson (1847- ) |
| Osgood, Nathaniel Ayres (1838- ) |
| Ostrander, Henry Hall (1832- ) |
| Owen, Charles (1824-1900) |
| Owen, Ezekiel (1813-1905) |
| Owen, George (1805-1891) |
| Owen, Smith (1809-1889) |
| Owen, William H. (1845-1884) |