| Name | Birth date | Relationship with Richard Langdon |
|---|
| Langdon, Joel Todd | August 21, 1975 | Son |
| Langdon, Kyleigh Grace | August 12, 1996 | Grandniece |
| Langdon, Leo Walter | October 20, 1987 | 1st cousin once removed |
| Langdon, Marie | 1908 | 1st cousin once removed |
| Langdon, Marina Claire | October 26, 1983 | 1st cousin once removed |
| Langdon, Mary Frances | 1879 | Grandaunt |
| Langdon, Maxwell James | June 04, 1981 | 1st cousin once removed |
| Langdon, Nancy | September 1966 | 1st cousin once removed |
| Langdon, Paul | May 18, 1949 | Brother |
| Langdon, Peter | 1848 | Great-grandfather |
| Langdon, Richard Elwood | January 14, 1945 | Self |
| Langdon, Robert Sherwood | December 20, 1941 | 1st cousin |
| Langdon, Ruth | | 1st cousin once removed |
| Langdon, Samantha Earlene | June 02, 1969 | Daughter of the wife |
| Langdon, Unknown | December 11, 1979 | 1st cousin once removed |
| Lee, Janet | | Wife of the 1st cousin |
| LeGrand, Frederick | 1830 | 2nd great-grandfather |
| LeGrand, Jeanette Elizabeth | June 13, 1856 | Great-grandmother |
| Lewis, Bradley Stephen | March 31, 1999 | 2nd cousin twice removed of the wife |
| Lewis, Lori Suzanne | November 02, 1972 | 2nd cousin once removed of the wife |
| Lewis, Richard Jefferson | May 21, 1979 | 2nd cousin once removed of the wife |
| Lewis, Stephen Frederick | June 25, 1967 | 2nd cousin once removed of the wife |
| Mahoney, Eileen | September 07, 1944 | Ex-wife of the brother |
| Mattoon, Caroline | November 20, 1843 | Great-grandmother of the wife |
| McDonald, David Dean | March 23, 1966 | 1st cousin once removed of the wife |
| McDonald, Kimberly Renee | August 01, 1974 | 1st cousin once removed of the wife |
| McGavern, Cecil George III | May 14, 1970 | 1st cousin once removed of the wife |
| McGavern, Megan Elizabeth | December 03, 1999 | 1st cousin twice removed of the wife |
| McGavern, Melanie Lynn | July 26, 1963 | 1st cousin once removed of the wife |
| McGavern, Rachel Danielle | March 06, 1998 | 1st cousin twice removed of the wife |
| McKinney, Carol | December 20, 1947 | 1st cousin |
| McKinney, child | | 1st cousin once removed |
| McKinney, Craig | December 20, 1947 | 1st cousin |
| McKinney, Joan | January 27, 1942 | 1st cousin |
| McKinney, Lisa Denise | 1967 | 1st cousin once removed |
| McKinney, Lisa Jenine | 1967 | 1st cousin once removed |
| McKinney, Raymond | | Husband of the aunt |
| McKinney, Raymond Chrysty | March 28, 1943 | 1st cousin |
| McKinney, Tad | | 1st cousin once removed |
| McKinney, Wayne | February 20, 1945 | 1st cousin |
| Morris, Jack Plank | November 05, 1950 | 1st cousin of the wife |
| Murray, Mary | 1851 | Great-grandmother |
| Murray, Peter | | 2nd great-grandfather |
| Noland, Austin Ray | August 26, 1991 | Grandnephew of the wife |
| Noland, Rebekah Lynn | May 04, 1997 | Grandniece of the wife |
| Parmelee, Jeffrey | 1965 | 1st cousin once removed |
| Parmelee, Robert | | Ex-husband of the 1st cousin |
| Parmelee, Steven | 1967 | 1st cousin once removed |
| Pearce, Florence | | Grandmother |
| Planck, Hanna | March 09, 1823 | 2nd great-grandaunt of the wife |