| Name | Birth date | Relationship with Robert Frei |
| McKnight, Matthew Joseph | Private | Husband of the niece |
| McMath, Kimberly | Private | Wife of the 4th cousin once removed |
| McMillian, Dorothy | Private | Wife of the 1st cousin twice removed |
| Mead, Howard | Private | Husband of the 1st cousin twice removed |
| Mead, John | | Husband of the 1st cousin 10 times removed |
| Mebie, Abraham | Bef. 26 Jun 1695 | 1st cousin 9 times removed |
| Mebie, Annetje | Bef. 16 Apr 1693 | 1st cousin 9 times removed |
| Mebie, Catrina | Abt. 1691 | 1st cousin 9 times removed |
| Mebie, Engeltie | Bef. 10 Nov 1697 | 1st cousin 9 times removed |
| Mebie, Eva | Abt. 1685 | 1st cousin 9 times removed |
| Mebie, Jacob | Bef. 05 May 1700 | 1st cousin 9 times removed |
| Mebie, Jan Pieterse | Bef. 04 Oct 1654 | 8th great-granduncle |
| Mebie, Jeremias | Bef. 25 Jun 1699 | 7th great-granduncle |
| Mebie, Margrietje | Abt. 1684 | 1st cousin 9 times removed |
| Mebie, Marritje | | 1st cousin 9 times removed |
| Mebie, Metje | Bef. 07 Oct 1704 | 1st cousin 9 times removed |
| Mebie, Pieter | Bef. 20 Jan 1685/86 | 1st cousin 9 times removed |
| Meeker, Mary | 1660 | 8th great-grandmother of the wife |
| Meeker, Robert | Bet. 1622 - 1626 | 9th great-grandfather of the wife |
| Meier, Claus | Abt. 1683 | 6th great-grandfather of the wife |
| Meier, Peter | 07 Jul 1709 | 5th great-granduncle of the wife |
| Meinecke, Brian Henry | Private | 3rd cousin once removed of the wife |
| Meinecke, Caroline Marion | Private | 3rd cousin once removed of the wife |
| Meinecke, Charles | Private | 2nd cousin once removed of the wife |
| Meinecke, Charles | Private | 3rd cousin of the wife |
| Meinecke, Daniel Martin | Private | 3rd cousin once removed of the wife |
| Meinecke, Donald Henry | Private | 3rd cousin of the wife |
| Meinecke, Evelyn | 16 Jul 1920 | 2nd cousin once removed of the wife |
| Meinecke, Glenn | Private | 3rd cousin of the wife |
| Meinecke, Henry | 21 Nov 1916 | 2nd cousin once removed of the wife |
| Meinecke, Jean Ann | Private | 3rd cousin of the wife |
| Meinecke, Judith A. | Private | 3rd cousin of the wife |
| Meinecke, Julie Ann | Private | 3rd cousin once removed of the wife |
| Meinecke, Kenneth Martin | Private | 3rd cousin of the wife |
| Meinecke, Lester | Private | 2nd cousin once removed of the wife |
| Meinecke, Lorraine | Private | 2nd cousin once removed of the wife |
| Meinecke, Lyla Mae | Private | 3rd cousin of the wife |
| Meinecke, Marie | 30 Jun 1915 | 2nd cousin once removed of the wife |
| Meinecke, Peter Henry | Private | 3rd cousin once removed of the wife |
| Meinecke, Sara Leigh | Private | 3rd cousin once removed of the wife |
| Mejia, Katrina | Private | Wife of the 1st cousin once removed |
| Mendenhall, Jemima | Abt. 1757 | Wife of the 1st cousin 7 times removed |
| Merchant, Elizabeth | Abt. 1809 | 3rd great-grandmother of the wife |
| Merchant, William | Abt. 1781 | 4th great-grandfather of the wife |
| Mershon, Mary | | 3rd cousin 5 times removed of the wife |
| Mershon, Samuel Davies | 05 Dec 1804 | 3rd cousin 5 times removed of the wife |
| Messerli, Loren Benson | Private | 2nd cousin once removed of the wife |
| Metta | Abt. 1636 | 7th great-grandmother of the wife |
| Meybaum, Jost | 17 Aug 1670 | 6th great-grandfather of the wife |
| Meybaumen, Jost | Abt. 1640 | 7th great-grandfather of the wife |