| Name | Relationship with Michael Biddulph | Civil | Canon |
| Mary | 4th great-grandmother | VI | 6 |
| Mauveisin, Christian | 21st great-grandmother | XXIII | 23 |
| Mauveisin, William | 22nd great-grandfather | XXIV | 24 |
| McBryde, David D | 4th great-grandfather | VI | 6 |
| McBryde, Jane | 3rd great-grandmother | V | 5 |
| McGlynn, Elizabeth | Wife of the 3rd great-granduncle | | |
| McMahon, Francis | 6th great-grandfather | VIII | 8 |
| McMahon, Francis (Frank) | 4th great-granduncle | VIII | 7 |
| McMahon, John | 4th great-granduncle | VIII | 7 |
| McMahon, Mary Elizabeth | 4th great-grandmother | VI | 6 |
| McMahon, Terence | 5th great-grandfather | VII | 7 |
| Meschines, Agnes | 23rd great-grandmother | XXV | 25 |
| 24th great-grandmother | XXVI | 26 |
| Meschines, Hugh (Keveliok) | 24th great-grandfather | XXVI | 26 |
| 25th great-grandfather | XXVII | 27 |
| Meschines, Ranulph De Gernon | 25th great-grandfather | XXVII | 27 |
| 26th great-grandfather | XXVIII | 28 |
| Midgley, Ann | Great-grandaunt | V | 4 |
| Midgley, Anne | 2nd great-grandaunt | VI | 5 |
| Midgley, Edward (Ted) David | Great-granduncle | V | 4 |
| Midgley, Edward David | 2nd great-granduncle | VI | 5 |
| Midgley, Eve | Great-grandaunt | V | 4 |
| Midgley, Florence (Sunny) Phyllis | Grandaunt | IV | 3 |
| Midgley, Francis (Frank) James | Great-granduncle | V | 4 |
| Midgley, Harry Power | Great-granduncle | V | 4 |
| Midgley, James | 3rd great-grandfather | V | 5 |
| Midgley, James | 2nd great-grandfather | IV | 4 |
| Midgley, Jane | Great-grandaunt | V | 4 |
| Midgley, Lucy | Great-grandaunt | V | 4 |
| Midgley, Madeline | Great-grandaunt | V | 4 |
| Midgley, Maud | Great-grandaunt | V | 4 |
| Midgley, Phillip Stanley | Great-grandfather | III | 3 |
| Midgley, Richard | 4th great-grandfather | VI | 6 |
| Midgley, Richard (Dick) | Great-granduncle | V | 4 |
| Midgley, Stanley Phillip | Granduncle | IV | 3 |
| Midgley, Stephen | Great-granduncle | V | 4 |
| Midgley, Vera Elizabeth | Grandmother | II | 2 |
| Midgley, Violet | Great-grandaunt | V | 4 |
| Milano, Stefano | Husband of the half grandaunt | | |
| Millar, Henry W | Husband of the 2nd great-grandmother | | |
| Miller, Joseph | Husband of the 3rd great-grandaunt | | |
| Husband of the 7th cousin 4 times removed | | |
| Husband of the 6th cousin 6 times removed | | |
| Husband of the 7th cousin 6 times removed | | |
| Husband of the 8th cousin 4 times removed | | |
| Mitchell, Albert | 2nd great-granduncle | VI | 5 |
| Mitchell, Edward | 2nd great-granduncle | VI | 5 |
| Mitchell, Elizabeth M A | 2nd great-grandmother | IV | 4 |
| Mitchell, George | 3rd great-grandfather | V | 5 |
| Mitchell, George | 2nd great-granduncle | VI | 5 |