| Name | Birth date | Relationship with Sean Mulcahey |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lessard, Marie O. | September 1894 | Great-grandaunt |
| | | 6th cousin 3 times removed |
| | | 7th cousin twice removed |
| | | 6th cousin 4 times removed |
| | | 7th cousin 3 times removed |
| Lessard, Michael | July 07, 1980 | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |
| | | 10th cousin |
| Lessard, Nadine Theresa | March 08, 1960 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lessard, Noel | June 11, 1774 | 5th great-grandfather |
| Lessard, Normand Eustis | April 09, 1934 | Granduncle |
| | | 7th cousin twice removed |
| | | 8th cousin once removed |
| | | 7th cousin 3 times removed |
| | | 8th cousin twice removed |
| Lessard, Pauline Lucinne | February 01, 1936 | Grandaunt |
| | | 7th cousin twice removed |
| | | 8th cousin once removed |
| | | 7th cousin 3 times removed |
| | | 8th cousin twice removed |
| Lessard, Pierre | May 07, 1836 | 3rd great-grandfather |
| Lessard, Raymond Oliver | November 14, 1937 | Granduncle |
| | | 7th cousin twice removed |
| | | 8th cousin once removed |
| | | 7th cousin 3 times removed |
| | | 8th cousin twice removed |
| Lessard, Robert | | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lessard, Robert | May 07, 1931 | Granduncle |
| | | 7th cousin twice removed |
| | | 8th cousin once removed |
| | | 7th cousin 3 times removed |
| | | 8th cousin twice removed |
| Lessard, Roland Ernest | May 25, 1941 | Grandfather |
| | | 7th cousin twice removed |
| | | 8th cousin once removed |
| | | 7th cousin 3 times removed |
| | | 8th cousin twice removed |
| Lessard, Ronald Louis | July 29, 1961 | Uncle |
| | | 8th cousin once removed |