| Name | Birth date | Death date |
| Postlethwait, Peter | December 23, 1853 | June 14, 1941 |
| Postlethwait, Presley M. | August 1861 | March 1942 |
| Postlethwait, Prestley M. | Abt. 1862 | Unknown |
| Postlethwait, Rachel | 1813 | Unknown |
| Postlethwait, Ralph w. | 1880 | Unknown |
| Postlethwait, Ray | Unknown | Unknown |
| Postlethwait, Ray | Unknown | Unknown |
| Postlethwait, Raymond Oscar | August 01, 1918 | October 13, 1984 |
| POSTLETHWAIT, REBECCA | Abt. 1842 | Unknown |
| Postlethwait, Rebecca M. | November 24, 1913 | February 02, 1960 |
| Postlethwait, Rhoda Jayne | October 26, 1874 | Unknown |
| Postlethwait, Richard | October 04, 1767 | Abt. 1858 |
| Postlethwait, Richard J. | March 01, 1851 | March 10, 1938 |
| Postlethwait, Richard Luther | Private | |
| POSTLETHWAIT, RICHARD NELSON | August 16, 1781 | October 28, 1867 |
| Postlethwait, Richard Nelson II | February 13, 1814 | April 14, 1891 |
| Postlethwait, Richard Nelson III | May 1853 | December 1934 |
| Postlethwait, Robert Noel | Private | |
| Postlethwait, Roberta | Abt. 1868 | Unknown |
| Postlethwait, Ronals Clarke | Private | |
| Postlethwait, Rosa Minnie | August 25, 1884 | November 15, 1972 |
| Postlethwait, Sally | Private | |
| Postlethwait, Samantha Ann | 1794 | Unknown |
| Postlethwait, Samantha B. | April 13, 1860 | Abt. 1904 |
| Postlethwait, Samuel | January 17, 1736/37 | August 24, 1809 |
| Postlethwait, Samuel | 1772 | 1824 |
| Postlethwait, Samuel | Abt. 1822 | Unknown |
| Postlethwait, Samuel Curtis | October 14, 1875 | April 27, 1894 |
| Postlethwait, Samuel L. | August 15, 1826 | Unknown |
| Postlethwait, Samuel Noel | Private | |
| Postlethwait, Samuel Wesley | March 06, 1814 | Unknown |
| Postlethwait, Sarah | December 16, 1878 | 1960 |
| Postlethwait, Sarah | Unknown | Unknown |
| Postlethwait, Sarah | March 03, 1813 | Unknown |
| Postlethwait, Sarah A. | May 13, 1873 | November 01, 1975 |
| Postlethwait, Sarah Eliza | 1763 | August 16, 1849 |
| Postlethwait, Sarah Elizabeth | November 08, 1894 | Unknown |
| Postlethwait, Sarah Jane | February 17, 1787 | May 15, 1872 |
| Postlethwait, Sarah M. | Abt. 1843 | Abt. 1918 |
| Postlethwait, Sarah Margaret | December 12, 1853 | August 21, 1937 |
| Postlethwait, Shirl | Unknown | Unknown |
| Postlethwait, Shirley | Private | |
| Postlethwait, Solomon | Abt. 1894 | Unknown |
| Postlethwait, Solomon Seymore | May 15, 1901 | May 22, 1973 |
| Postlethwait, Solomon Simon | September 12, 1869 | December 22, 1905 |
| Postlethwait, Spencer A.H.S. | Abt. 1869 | Unknown |
| Postlethwait, Susan | Abt. 1864 | Abt. 1895 |
| Postlethwait, Susannah | Abt. 1735 | Unknown |
| Postlethwait, Susannah | August 17, 1809 | Unknown |
| Postlethwait, Terra Lynn | Private | |