| Name | Birth date | Relationship with Sean Mulcahey |
| Jacobson, Christof Martin | August 26, 1911 | Great-granduncle |
| Jacobson, Florence | August 10, 1916 | Great-grandaunt |
| Jacobson, Henry | June 1899 | Great-granduncle |
| Jacobson, John | January 01, 1895 | Great-granduncle |
| Jacobson, Mary | 1907 | Great-grandaunt |
| Jacobson, Mary | 1942 | 1st cousin twice removed |
| Jacobson, Rebecca Freida | January 1905 | Great-grandaunt |
| Jacobson, Wife | Abt. 1845 | 3rd great-grandmother |
| Jacobson, William Martin | September 23, 1901 | Great-granduncle |
| Jaret, Anne | Abt. 1725 | 8th great-grandmother |
| Jarret, André | Abt. 1705 | 9th great-grandfather |
| Jeane | | 9th great-grandmother |
| Jennings, Mary | Abt. 1855 | 3rd great-grandmother |
| Jentès, Etienne | Bef. 1753 | 9th great-grandfather |
| Jentès, Marg. | Bef. 1768 | 8th great-grandmother |
| Jo, Laurie | | Wife of the 1st cousin once removed |
| | | 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 |
| Joffrion, Gabriel | Bef. 1783 | 7th great-grandfather |
| | | Husband of the 7th great-grandaunt |
| Joffrion, Gabriel | Bef. 1798 | 6th great-grandfather |
| | | 1st cousin 8 times removed |
| | | Husband of the 2nd cousin 7 times removed |
| | | Husband of the 2nd cousin 8 times removed |
| Joffrion, Jean | | 8th great-grandfather |
| Joffrion, Pierre | | 9th great-grandfather |
| Jones, Dudley Marshall | | Husband of the great-grandaunt |
| Jordan, Debra | | Wife of the 1st cousin once removed |
| Joseph | | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |
| | | 10th cousin |
| Julie | | Wife of the granduncle |
| | | Wife of the 7th cousin twice removed |
| | | Wife of the 8th cousin once removed |
| | | Wife of the 7th cousin 3 times removed |
| | | Wife of the 8th cousin twice removed |
| Jutras, Marie-Louise | Abt. 1720 | 7th great-grandmother |
| Jutrat, Dom. | Abt. 1670 | 9th great-grandfather |
| Jutrat, Mich. | Abt. 1700 | 8th great-grandfather |
| Kane, Nicole | February 20, 1990 | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |
| | | 10th cousin |
| Kane, Raymond | August 22, 1955 | 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 |