| Name | Birth date | Relationship with Sean Mulcahey |
| Lappen, Sibling5 | | 3rd great-granduncle |
| Lappen, Sibling6 | | 3rd great-grandaunt |
| Lappen, Sibling7 | | 3rd great-granduncle |
| Lappen, Sibling8 | | 3rd great-grandaunt |
| Lappen, Thomas Francis | January 06, 1878 | 2nd great-granduncle |
| Lappen, William | November 08, 1875 | 2nd great-granduncle |
| Laré, Et. | Abt. 1675 | 8th great-grandmother |
| Laré, Jean | Abt. 1645 | 9th great-grandfather |
| Largueil, Mar. | Abt. 1685 | 8th great-grandmother |
| Larquiel, Pierre | Abt. 1655 | 9th great-grandfather |
| Laryot, Pér. | Abt. 1630 | 9th great-grandmother |
| Laserte, Catherine | Abt. 1745 | 6th great-grandmother |
| Laura | | Wife of the half 2nd cousin once removed |
| Le brodeux, Catherine | Bef. 1798 | 6th great-grandmother |
| | | 2nd cousin 8 times removed |
| Le Camus, Elisabeth | Abt. 1675 | 8th great-grandmother |
| Le Camus, Pierre | Abt. 1645 | 9th great-grandfather |
| Le Duc, Georg. | Abt. 1645 | 9th great-grandmother |
| Le Due, Antoine | | 9th great-grandfather |
| Le Roy, J.-Françoise | Abt. 1630 | 9th great-grandmother |
| Leclere, Et. | Abt. 1670 | 9th great-grandmother |
| Ledue, Elisabeth | | 7th great-grandmother |
| Ledue, Pierre-Chs. | | 8th great-grandfather |
| Lefrançois, Mar. | | 8th great-grandmother |
| Lefrançois, Pierre | | 9th great-grandfather |
| Lefroy, Françoise | Abt. 1645 | 9th great-grandmother |
| Lemieux, Mart. | Abt. 1660 | 9th great-grandmother |
| Lemire, Al. | Abt. 1720 | 7th great-grandfather |
| Lemire, Antoine | Abt. 1745 | 6th great-grandfather |
| Lemire, Jean | Abt. 1670 | 9th great-grandfather |
| Lemire, Jean-François | Abt. 1700 | 8th great-grandfather |
| Lemire, Maguerite | Abt. 1780 | 5th great-grandmother |
| Lemoyne, Anne | Bef. 1753 | 9th great-grandmother |
| Lenahan, Daughter | | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |
| | | 10th cousin |
| Lenahan, Dave | May 23, 1951 | 1st cousin once removed |
| | | 8th cousin once removed |
| | | 9th cousin |
| | | 8th cousin twice removed |
| | | 9th cousin once removed |
| Lenahan, Husband1 | | 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 |
| Lenahan, Husband2 | | Husband of the 1st cousin once removed |
| | | Husband of the 8th cousin once removed |
| | | Husband of the 9th cousin |