| Name | Birth date | Relationship with Richard Langdon |
|---|
| ?, Mary Ellen | | Wife of the granduncle |
| Adams, Barbara Ann | | 1st cousin |
| Adams, Carol Joan | | 1st cousin |
| Adams, Catherine Elaine | May 14, 1972 | 1st cousin once removed |
| Adams, Donald James | March 23, 1943 | 1st cousin |
| Adams, George | | Husband of the aunt |
| Adams, George Bryan | February 12, 1978 | 1st cousin once removed |
| Adams, Kimberley | June 22, 1965 | 1st cousin once removed |
| Adams, Melissa Ann | October 28, 1968 | 1st cousin once removed |
| Adams, Wayne | | 1st cousin |
| Arthur, Leslie Alan, Jr | February 15, 1988 | Grandnephew of the wife |
| Austin, Ada Marie | June 25, 1939 | 1st cousin of the wife |
| Austin, Arthur Converse, Jr | February 19, 1944 | 1st cousin of the wife |
| Austin, Dorothy Orilla | August 02, 1936 | 1st cousin of the wife |
| Austin, Edith Nell | March 10, 1938 | 1st cousin of the wife |
| Austin, Elizabeth Isabelle Joan | September 06, 1947 | 1st cousin of the wife |
| Austin, Judith Aileen | January 15, 1965 | Niece of the wife |
| Austin, Melanie Erlynn | February 20, 1959 | Niece of the wife |
| Austin, Rachel LiAnne | October 04, 1997 | Grandniece of the wife |
| Austin, Rollin Suttle | March 09, 1971 | Nephew of the wife |
| Austin, Taryn Denise | August 02, 1995 | Grandniece of the wife |
| Austin, Teresa Lynn | February 03, 1963 | Niece of the wife |
| Bender, Catherine | August 06, 1788 | 3rd great-grandmother of the wife |
| Blanck, Jeremias | July 18, 1828 | 2nd great-granduncle of the wife |
| Blank, Catharina | June 18, 1820 | 2nd great-grandaunt of the wife |
| Blank, Conrad Johannes | September 10, 1765 | 4th great-grandfather of the wife |
| Blank, George | April 06, 1741 | 5th great-grandfather of the wife |
| Blank, Jacob B | January 04, 1814 | 2nd great-grandfather of the wife |
| Blank, Johann H | 1815 | 2nd great-granduncle of the wife |
| Blank, Maria Anna | November 02, 1817 | 2nd great-grandaunt of the wife |
| Blodgett, Milton J. | March 23, 1907 | Husband of the aunt |
| Bowden, Amanda Lee | September 07, 1988 | Grandniece of the wife |
| Bowden, Amy Marie | October 02, 1990 | Grandniece of the wife |
| Bowden, Christine Faye | March 15, 1960 | Niece of the wife |
| Bowden, Paul Howard, Jr | September 13, 1961 | Nephew of the wife |
| Bryan, Holly | | Wife of the 1st cousin |
| Burrell, Chelsa Danette | August 27, 1987 | Grandniece of the wife |
| Candidus, Clara | December 16, 1909 | Wife of the uncle |
| Carlson, Claudia | May 23, 1940 | Wife of the 1st cousin |
| Caswell, Gabriel Sion | July 26, 1976 | 2nd cousin twice removed of the wife |
| Cawthon, Agnes Salome | November 28, 1911 | 1st cousin once removed of the wife |
| Cawthon, Jennifer | | 2nd cousin once removed of the wife |
| Cawthon, Lewis Frank, Jr | April 17, 1927 | 2nd cousin of the wife |
| Cawthon, Lewis Frank, Sr | August 02, 1902 | 1st cousin once removed of the wife |
| Cawthon, Rachael Salena | March 01, 1905 | 1st cousin once removed of the wife |
| Cawthon, Stella Margaret | September 26, 1928 | 2nd cousin of the wife |
| Cawthon, Winifred Elaine | June 17, 1932 | 2nd cousin of the wife |
| Chapin, Erik | | Husband of the niece |
| Cline, Elizabeth | November 07, 1821 | 2nd great-grandmother of the wife |
| Couch, David Lewis | | 2nd cousin once removed of the wife |