| Name | Birth date | Relationship with Michael McGrath |
|---|
| Krolczyk, Patricia Ann | 7/26/1941 | 3rd cousin |
| Kuzera, Elizabeth | | Sister-in-law |
| Lalonde, Anthony George Edward | 3/25/1911 | Husband of the 1st cousin twice removed |
| Langan, Cecilia | Abt. 1885 | 2nd cousin twice removed |
| Langan, Frank | Abt. 1881 | 2nd cousin twice removed |
| Langan, James Joseph | | 1st cousin 3 times removed |
| Langan, John | | 1st cousin 3 times removed |
| Langan, Josephine | Abt. 1890 | 2nd cousin twice removed |
| Langan, Kenneth | | 2nd cousin twice removed |
| Langan, Leo | | 2nd cousin twice removed |
| Langan, Lillian | | 1st cousin 3 times removed |
| Langan, Michael | 2/25/1855 | Husband of the 2nd great-grandaunt |
| Langan, Thomas | | 1st cousin 3 times removed |
| Langan, Zephyrina Josephine | 9/27/1888 | 2nd cousin twice removed |
| Laura | 9/5/1891 | Wife of the 1st cousin 3 times removed |
| Lenz, Ollie Tom | | Husband of the 2nd cousin once removed |
| Lero, Agnes | | Great-grandaunt |
| Lero, Mary | | Great-grandmother |
| Lero, Michael | | Great-granduncle |
| Lero, Susan | | Great-grandaunt |
| Lorri | | Wife of the 3rd cousin once removed |
| Lowe, George Keith | Abt. 1902 | Husband of the 2nd cousin twice removed |
| Machos, ? | | Husband of the great-grandaunt |
| Maidment, Ruth | | Wife of the 3rd cousin once removed |
| Manerfield, ? | | 2nd cousin |
| Manerfield, ? | | 2nd cousin |
| Manerfield, ? Adopted | | 2nd cousin |
| Manerfield, Donald | | 1st cousin once removed |
| Manerfield, Nicholas | | 1st cousin once removed |
| Manerfield, Susan | | 1st cousin once removed |
| Manerfield, Walter | | Husband of the grandaunt |
| Margaret | | Wife of the 1st cousin 3 times removed |
| Marlatt, John | 11/9/1949 | Husband of the 3rd cousin once removed |
| Mason, ? | | 2nd cousin twice removed |
| Mason, Aileen | | 2nd cousin twice removed |
| Mason, Alfred | | 2nd cousin twice removed |
| Mason, Ambrose Jeremiah | 12/25/1888 | 1st cousin 3 times removed |
| Mason, Anastasia | 4/23/1889 | Great-grandaunt |
| Mason, Anne | 1884 | 1st cousin 3 times removed |
| Mason, Carolyn | | 3rd cousin once removed |
| Mason, Catherine Gertrude | 2/13/1885 | 1st cousin 3 times removed |
| Mason, Daughter | | 1st cousin twice removed |
| Mason, David | | 3rd cousin once removed |
| Mason, Debra | | 3rd cousin once removed |
| Mason, Dennis | 4/29/1879 | 1st cousin 3 times removed |
| Mason, Donald | | 3rd cousin once removed |
| Mason, Doug | | 3rd cousin once removed |
| Mason, Eugene | | 1st cousin twice removed |
| Mason, Eugene | 11/1/1847 | 2nd great-grandfather |
| Mason, Eugene | 6/16/1877 | 1st cousin 3 times removed |
