| Name | Birth date | Relationship with Richard Langdon |
|---|
| Couch, Zaba Frank III | | 2nd cousin once removed of the wife |
| Curley, Erin Rebecca | November 20, 1985 | 1st cousin twice removed of the wife |
| Curley, Marc Allen | November 05, 1982 | 1st cousin twice removed of the wife |
| Curley, Ryan Douglas | June 14, 1987 | 1st cousin twice removed of the wife |
| Dallas, Alexander III | | Ex-husband of the 1st cousin |
| Dallas, Alexander IV | March 13, 1959 | 1st cousin once removed |
| Dallas, Carol Ann | December 30, 1956 | 1st cousin once removed |
| Dallas, Clifford | December 31, 1957 | 1st cousin once removed |
| Dallas, James Gregory | October 23, 1961 | 1st cousin once removed |
| Dallas, Jamie | November 08, 1980 | 1st cousin twice removed |
| Dallas, Jeffrey | January 26, 1956 | 1st cousin once removed |
| Dallas, Joann | December 1978 | 1st cousin twice removed |
| Dietrich, Linda | | Wife of the 1st cousin |
| Dolby, Aidan Jonathan | May 06, 1997 | 1st cousin twice removed of the wife |
| Dolby, Alyssa Noelle | September 25, 1990 | 1st cousin twice removed of the wife |
| Dolby, Austin James | May 09, 1985 | 1st cousin twice removed of the wife |
| Dolby, David Livingston | May 07, 1991 | 1st cousin twice removed of the wife |
| Dolby, Deborah Lynn | May 31, 1957 | 1st cousin once removed of the wife |
| Dolby, Dwight Leroy | July 24, 1960 | 1st cousin once removed of the wife |
| Dolby, Hope Bernadette | | 1st cousin twice removed of the wife |
| Dolby, Johnathan Edward | December 13, 1961 | 1st cousin once removed of the wife |
| Dolby, Natalie Joy | January 05, 1987 | 1st cousin twice removed of the wife |
| Dolby, Rebecca Lee | December 09, 1958 | 1st cousin once removed of the wife |
| Dolby, Robert Douglas | August 03, 1992 | 1st cousin twice removed of the wife |
| Dolby, Samuel Johnson | February 14, 1989 | 1st cousin twice removed of the wife |
| Drovin, Gerald | | Husband of the 1st cousin |
| Drovin, Twin1 | February 1981 | 1st cousin once removed |
| Drovin, Twin2 | February 1981 | 1st cousin once removed |
| Drovin, Unknown | 1972 | 1st cousin once removed |
| Dudeck, Linda | | Wife of the 1st cousin |
| Dunn, Andrew | | Uncle |
| Dunn, Andrew J. II | | Grandfather |
| Dunn, Florence | | Aunt |
| Dunn, Grace Anne | September 22, 1914 | Mother |
| Dunn, Jerico Casey | December 24, 1978 | 1st cousin once removed |
| Dunn, John | | Great-grandfather |
| Dunn, John Kevin | August 14, 1952 | 1st cousin |
| Dunn, Kevin | September 1980 | 1st cousin once removed |
| Dunn, Lindsay Anne | November 19, 1976 | 1st cousin once removed |
| Dunn, Lisa Marie | May 21, 1978 | 1st cousin once removed |
| Dunn, Ryan | April 07, 1980 | 1st cousin once removed |
| Dunn, Stephen Mathew | August 14, 1952 | 1st cousin |
| Dunn, Thomas Andrew | September 23, 1950 | 1st cousin |
| Eckland, Elaina Elizabeth | July 31, 1996 | 2nd cousin twice removed of the wife |
| Eckland, Erica Elise | August 05, 1992 | 2nd cousin twice removed of the wife |
| Fairweather, Fred | | Husband of the grandaunt |
| Frederick, Barry | November 03, 1975 | 1st cousin once removed |
| Frederick, Brian | July 07, 1977 | 1st cousin once removed |
| Frederick, Raquel Ann | December 27, 1974 | 1st cousin once removed |
| Frederick, Ray | | Husband of the 1st cousin |