| Name | Birth date | Relationship with Sean Mulcahey |
| Messier, François-M. | Bef. 1768 | 8th great-grandfather |
| | | 8th great-granduncle |
| Messier, Jacques | Bef. 1828 | 4th great-grandfather |
| | | 3rd cousin 7 times removed |
| | | 4th cousin 6 times removed |
| | | Husband of the 3rd cousin 6 times removed |
| | | Husband of the 4th cousin 5 times removed |
| | | Husband of the 4th cousin 6 times removed |
| Messier, Jean-Baptiste | Bef. 1783 | 7th great-grandfather |
| | | 1st cousin 9 times removed |
| Messier, Joachim | Bef. 1813 | 5th great-grandfather |
| | | 2nd cousin 8 times removed |
| | | 3rd cousin 7 times removed |
| | | Husband of the 3rd cousin 7 times removed |
| Messier, Marie-Anne | Bef. 1768 | 8th great-grandmother |
| | | 8th great-grandaunt |
| Messier, Mich. | Bef. 1753 | 9th great-grandfather |
| Messier, Tharsile | Bef. 1843 | 3rd great-grandmother |
| | | 4th cousin 5 times removed |
| | | 5th cousin 4 times removed |
| | | 4th cousin 6 times removed |
| | | 5th cousin 5 times removed |
| | | Wife of the 4th cousin 5 times removed |
| | | Wife of the 5th cousin 4 times removed |
| | | Wife of the 5th cousin 5 times removed |
| Meunier, Anne | Bef. 1768 | 8th great-grandmother |
| | | 7th great-grandaunt |
| | | 8th great-grandaunt |
| Meunier, Bert. | Bef. 1738 | 9th great-grandfather |
| | | 10th great-grandfather |
| Meunier, Madeleine | Bef. 1768 | 8th great-grandmother |
| | | 7th great-grandaunt |
| | | 8th great-grandaunt |
| Meunier, Marie-Anne | Bef. 1783 | 7th great-grandmother |
| | | 8th great-grandaunt |
| Meunier, Pierre | Bef. 1753 | 8th great-grandfather |
| | | 9th great-grandfather |
| Michael | | Husband of the 1st cousin twice removed |
| Mignerion, Jean | | 8th great-grandfather |
| Migneron, Jean-Baptiste | Bef. 1783 | 7th great-grandfather |
| | | Husband of the 1st cousin 9 times removed |
| Migneron, Laur. | | 9th great-grandfather |
| Miller, Charles E., Jr. | November 11, 1948 | Husband of the 2nd cousin once removed |
| Miller, Kerrie Lynn | July 11, 1987 | 3rd cousin |
| Mitchell | | Husband of the half 1st cousin twice removed |
| Mondain, Antoine | Abt. 1695 | 9th great-grandfather |
| Mondin, Théresa | Bef. 1768 | 8th great-grandmother |
| Mongeau, Jean-Baptiste | | 8th great-grandfather |
| Mongeau, Marie-Anne | Bef. 1783 | 7th great-grandmother |
| | | Wife of the 1st cousin 9 times removed |