| Name | Birth date | Relationship with Sean Mulcahey |
| | | Wife of the 9th cousin |
| | | Wife of the 8th cousin twice removed |
| | | Wife of the 9th cousin once removed |
| Marnane, Anna Jerome | January 19, 1901 | Great-grandmother |
| Marnane, Anna M. | July 09, 1906 | 1st cousin 3 times removed |
| Marnane, Cornelius | 1871 | 2nd great-grandfather |
| Marnane, Edmond | | 2nd great-granduncle |
| Marnane, Edmond F. | June 29, 1908 | 1st cousin 3 times removed |
| Marnane, Helene Victorine | April 26, 1903 | Great-grandaunt |
| Marnane, James E. | | 2nd great-granduncle |
| Marnane, Mary Theresa | June 22, 1899 | Great-grandaunt |
| Marnane, Michael | Bef. 1871 | 3rd great-grandfather |
| Marnane, Wife | | Wife of the 2nd great-granduncle |
| Marsolet, Louise | Abt. 1670 | 9th great-grandmother |
| Martin, Louise | Abt. 1655 | 9th great-grandmother |
| Martin, Mar. | Abt. 1655 | 9th great-grandmother |
| Martinelli, Judy | July 28, 1962 | 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 |
| Mary | Bef. 1850 | 3rd great-grandmother |
| Mary | Bef. 1871 | 3rd great-grandmother |
| Mary | Abt. 1900 | Wife of the great-granduncle |
| Mary E. | 1877 | Wife of the 2nd great-granduncle |
| Matthew | | 2nd cousin |
| | | 9th cousin |
| | | 9th cousin once removed |
| | | 10th cousin |
| McBennett, Mary | Abt. 1830 | 4th great-grandmother |
| McDonald, Carol Maureen | October 15, 1939 | 1st cousin twice removed |
| McDonald, Charles Henry | November 01, 1902 | Husband of the great-grandaunt |
| McDonald, Charles Henry, Jr. | May 22, 1936 | 1st cousin twice removed |
| McDonald, Diane | February 10, 1934 | 1st cousin twice removed |
| McDonald, Helene Theresa | November 24, 1931 | 1st cousin twice removed |
| McDonald, John Martin | July 17, 1964 | 2nd cousin once removed |
| McDonald, Kelle Marie | June 28, 1963 | 2nd cousin once removed |
| McDonald, Nicole Paquette | January 03, 1995 | 3rd cousin |
| McDonald, Peter John | May 31, 1968 | 2nd cousin once removed |
| McDonald, Todd Currivan | June 19, 1970 | 2nd cousin once removed |
| McDonald, William Kevin | April 12, 1943 | 1st cousin twice removed |
| McGinn, Aileen M. | | Wife of the great-granduncle |
| McKenna, Mary | Abt. 1820 | 4th great-grandmother |
| McKivergan, Anna K. | November 03, 1887 | 1st cousin 3 times removed |
| McKivergan, Anne | | 2nd great-grandaunt |
| McKivergan, Bernard | | 2nd great-granduncle |
| McKivergan, Catherine L. | May 10, 1902 | 1st cousin 3 times removed |
| McKivergan, Charles Frederick | June 06, 1899 | 1st cousin 3 times removed |
| McKivergan, Daughter | December 28, 1889 | 1st cousin 3 times removed |
| McKivergan, Gertrude | February 03, 1894 | 1st cousin 3 times removed |