| Name | Birth date | Relationship with Richard Langdon |
|---|
| Plank, Alice | August 25, 1854 | Great-grandaunt of the wife |
| Plank, Amber | October 02, 1982 | 1st cousin once removed of the wife |
| Plank, Amber Nichole | January 18, 1989 | Grandniece of the wife |
| Plank, Anna Margaret | December 25, 1844 | Great-grandaunt of the wife |
| Plank, Barbara Sue | December 07, 1942 | Sister-in-law |
| Plank, Catharine | March 17, 1799 | 3rd great-grandaunt of the wife |
| Plank, Catharine Elizabeth | January 01, 1833 | 2nd great-grandaunt of the wife |
| Plank, Catherine | June 18, 1820 | 2nd great-grandaunt of the wife |
| Plank, Conradt | September 22, 1802 | 3rd great-granduncle of the wife |
| Plank, Danielle | October 13, 1984 | 1st cousin once removed of the wife |
| Plank, David Seth | April 29, 1957 | 1st cousin of the wife |
| Plank, Donald Hugh | August 19, 1943 | 1st cousin of the wife |
| Plank, Donald Kruse | January 01, 1917 | Uncle of the wife |
| Plank, Edith Caroline | December 16, 1909 | Aunt of the wife |
| Plank, Elizabeth | November 27, 1804 | 3rd great-grandaunt of the wife |
| Plank, Emma Idella | October 04, 1941 | Sister-in-law |
| Plank, Estella | January 09, 1871 | Grandaunt of the wife |
| Plank, Esther Naoma | August 22, 1907 | Aunt of the wife |
| Plank, Felix | April 17, 1848 | Great-granduncle of the wife |
| Plank, Finis Ewing | December 12, 1876 | Grandfather of the wife |
| Plank, Herbert Levi | August 28, 1905 | Uncle of the wife |
| Plank, Hunter Maxwell | September 08, 1998 | 1st cousin twice removed of the wife |
| Plank, Irene | January 23, 1862 | Great-grandaunt of the wife |
| Plank, Jacob | December 14, 1810 | 3rd great-granduncle of the wife |
| Plank, James | January 13, 1797 | 3rd great-granduncle of the wife |
| Plank, Jason Andrew | February 27, 1979 | 1st cousin once removed of the wife |
| Plank, Jeffrey Alan | September 09, 1970 | 1st cousin once removed of the wife |
| Plank, Jesse | December 02, 1813 | 3rd great-granduncle of the wife |
| Plank, Johan George | January 10, 1791 | 3rd great-grandfather of the wife |
| Plank, Johann Henrich | December 12, 1800 | 3rd great-granduncle of the wife |
| Plank, Johannes | February 02, 1795 | 3rd great-granduncle of the wife |
| Plank, John Maxwell | August 21, 1970 | 1st cousin once removed of the wife |
| Plank, Judith Cheryl | September 12, 1947 | Sister-in-law |
| Plank, Justin Stockwell | February 05, 1978 | 1st cousin once removed of the wife |
| Plank, Lakelynn Half-Moon | September 08, 1998 | 1st cousin twice removed of the wife |
| Plank, Larry Gene | August 02, 1945 | 1st cousin of the wife |
| Plank, Laurian M'Lou | September 11, 1953 | 1st cousin of the wife |
| Plank, Laurie Renee | October 27, 1981 | 1st cousin once removed of the wife |
| Plank, Leland Flint | April 02, 1962 | Nephew of the wife |
| Plank, Leland Herbert | March 31, 1937 | Brother-in-law |
| Plank, Leland Robert | January 10, 1997 | Grandnephew of the wife |
| Plank, Levi W | July 25, 1842 | Great-grandfather of the wife |
| Plank, Linda Allison | December 29, 1963 | Niece of the wife |
| Plank, Linda Lou | September 02, 1946 | Wife |
| Plank, Lisa Jean | August 12, 1966 | Niece of the wife |
| Plank, Louisiana | July 10, 1825 | 2nd great-grandaunt of the wife |
| Plank, Marcella Zeffie | January 18, 1947 | 1st cousin of the wife |
| Plank, Maria Magdalena | November 12, 1806 | 3rd great-grandaunt of the wife |
| Plank, Mary Ruth | September 23, 1945 | 1st cousin of the wife |
| Plank, Montje Stockwell | September 19, 1951 | 1st cousin of the wife |