| Name | Birth date | Relationship with Sean Mulcahey |
| Truteau, Etienne | | 9th great-grandfather |
| Truteau, Marie-Josephte | | 7th great-grandmother |
| Turcotte, Louise | Abt. 1880 | 2nd great-grandmother |
| Tyler, Tracey | | Husband of the 2nd cousin once removed |
| Vacher, Guill. | Abt. 1670 | 9th great-grandfather |
| Vacher, Jean-Christian | Abt. 1700 | 8th great-grandfather |
| Vacher, Jean-Christian | Abt. 1720 | 7th great-grandfather |
| Valade, Marie | | 9th great-grandmother |
| Velez, Armando | | Ex-husband of the 1st cousin once removed |
| Velez, Armando | December 12, 1975 | 2nd cousin |
| Velez, Christine | November 11, 1973 | 2nd cousin |
| Velez, Elizabeth | February 14, 1977 | 2nd cousin |
| Vésinat, Anne | | 9th great-grandmother |
| Viel, Marie-Madeleine | | 8th great-grandmother |
| Viel, Pierre | | 9th great-grandfather |
| Vitkus, Cindy | October 18, 1975 | 2nd cousin |
| Vitkus, Richard | June 08, 1973 | 2nd cousin |
| Vitkus, Richard Joseph | April 17, 1945 | Husband of the 1st cousin once removed |
| Walsh, David Stevenson | | Ex-husband of the 1st cousin twice removed |
| Warren, Rachel Erica | June 20, 1974 | Half 3rd cousin |
| Warren, Randolph | | Husband of the half 2nd cousin once removed |
| Waters, Blanche W. | | Wife of the granduncle |
| Watson, William | Abt. 1880 | Husband of the great-grandaunt |
| Weagly, Darren | | 2nd cousin once removed |
| Weagly, Dawn | | 2nd cousin once removed |
| Weagly, Richard | | Husband of the 1st cousin twice removed |
| Webster, Kiel Storm | September 12, 1992 | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |
| | | 10th cousin |
| Webster, Michael | | Husband of the 1st cousin once removed |
| | | Husband of the 8th cousin once removed |
| | | Husband of the 9th cousin |
| | | Husband of the 8th cousin twice removed |
| | | Husband of the 9th cousin once removed |
| Wife | | Wife of the 2nd cousin |
| Wilson, Terri Kathleen | March 20, 1964 | Wife of the uncle |
| | | Wife of the 8th cousin once removed |
| | | Wife of the 9th cousin |
| | | Wife of the 8th cousin twice removed |
| | | Wife of the 9th cousin once removed |
| Woodward, Mary Ann | Abt. 1850 | 2nd great-grandmother |
| Zoran | | Husband of the 1st cousin once removed |
| | | Husband of the 8th cousin once removed |
| | | Husband of the 9th cousin |
| | | Husband of the 8th cousin twice removed |
| | | Husband of the 9th cousin once removed |
| Zoran, Gina | | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |