| Name | Birth date | Relationship with Sean Mulcahey |
| | | 9th cousin once removed |
| Lessard, Jean-Baptiste | February 17, 1861 | 2nd great-grandfather |
| | | Husband of the 5th cousin 4 times removed |
| | | Husband of the 6th cousin 3 times removed |
| | | Husband of the 5th cousin 5 times removed |
| | | Husband of the 6th cousin 4 times removed |
| Lessard, Jeffery Normand | January 17, 1972 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lessard, John | | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lessard, Joseph | December 23, 1892 | Great-granduncle |
| | | 6th cousin 3 times removed |
| | | 7th cousin twice removed |
| | | 6th cousin 4 times removed |
| | | 7th cousin 3 times removed |
| Lessard, Joseph Louis | June 19, 1806 | 4th great-grandfather |
| Lessard, Karen Lynn | October 25, 1970 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lessard, Laura | May 08, 1971 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lessard, Leona | | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lessard, Leonie | September 17, 1884 | Great-grandaunt |
| | | 6th cousin 3 times removed |
| | | 7th cousin twice removed |
| | | 6th cousin 4 times removed |
| | | 7th cousin 3 times removed |
| Lessard, Louise | March 26, 1926 | Grandaunt |
| | | 7th cousin twice removed |
| | | 8th cousin once removed |
| | | 7th cousin 3 times removed |
| | | 8th cousin twice removed |
| Lessard, Maria Elena | May 26, 1966 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |