| Name | Birth date | Relationship with Sean Mulcahey |
| Fontaine, Jacques | Bef. 1753 | 9th great-grandfather |
| Fontaine, Marg. | | 8th great-grandmother |
| Fontaine, Marie-Madeleine | Bef. 1783 | 7th great-grandmother |
| | | 7th great-grandaunt |
| | | Wife of the 1st cousin 9 times removed |
| Fontaine, Pierre | | 9th great-grandfather |
| Fontaine, Pierre | Bef. 1768 | 8th great-grandfather |
| Fortier, Patricia Rose | April 06, 1939 | 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 |
| Fortin, Gen. | Abt. 1660 | 9th great-grandmother |
| Foucault, Françoise | Abt. 1700 | 8th great-grandmother |
| Fournier, Mar. | Abt. 1660 | 9th great-grandmother |
| François, Jean | Abt. 1670 | 9th great-grandfather |
| Frogent, Françoise | | 9th great-grandmother |
| Gagné, Al. | Abt. 1660 | 9th great-grandfather |
| Gagné, Alex. | Abt. 1630 | 9th great-grandfather |
| Gagné, Gen. | Abt. 1690 | 8th great-grandmother |
| Gagné, Jean-Baptiste | Abt. 1670 | 8th great-grandfather |
| Gagné, Mart. | Abt. 1720 | 7th great-grandmother |
| Gagnon, Anne | March 23, 1709/10 | 7th great-grandmother |
| Gagnon, Germ. | Abt. 1630 | 9th great-grandfather |
| Gagnon, Marguerite | Abt. 1720 | 7th great-grandmother |
| Gagnon, Noël | Abt. 1660 | 9th great-grandfather |
| Gagnon, Pierre | Abt. 1690 | 8th great-grandfather |
| Gagnon, Raphael | 1689 | 8th great-grandfather |
| Galbrun, Catherine | | 9th great-grandmother |
| Ganley, Bernard | August 08, 1895 | Husband of the 2nd great-grandaunt |
| Garatte, Louise | Abt. 1645 | 9th great-grandmother |
| Gaspar, Maria | February 03, 1930 | 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 |
| Gaudet, François | Abt. 1725 | 6th great-grandfather |
| Gaudet, François | Bef. 1813 | 5th great-grandfather |
| | | Husband of the 3rd cousin 6 times removed |
| | | Husband of the 3rd cousin 7 times removed |
| Gaudet, Jean-Baptiste | Bef. 1828 | 4th great-grandfather |
| | | 4th cousin 5 times removed |
| | | 4th cousin 6 times removed |
| | | Husband of the 3rd cousin 6 times removed |
| | | Husband of the 4th cousin 6 times removed |
| Gaudette, Jean-Baptiste | Bef. 1843 | 3rd great-grandfather |
| | | 4th cousin 5 times removed |
| | | 5th cousin 4 times removed |
| | | 5th cousin 5 times removed |
| | | Husband of the 4th cousin 5 times removed |