| Name | Relationship with Michael Biddulph | Civil | Canon |
| Mitchell, James | 2nd great-granduncle | VI | 5 |
| Mitchell, John | 4th great-grandfather | VI | 6 |
| Mitchell, John | 2nd great-granduncle | VI | 5 |
| Mitchell, Marian | 2nd great-grandaunt | VI | 5 |
| Montfort, Bertrade | 24th great-grandmother | XXVI | 26 |
| 25th great-grandmother | XXVII | 27 |
| Mooney, Catherine | 5th great-grandmother | VII | 7 |
| Mooney, John | 6th great-grandfather | VIII | 8 |
| Moore, Catherine Anne | Great-grandaunt | V | 4 |
| Moore, Charles Henry | Great-granduncle | V | 4 |
| Moore, Clara Agnes | Great-grandmother | III | 3 |
| Moore, Ellen May | Great-grandaunt | V | 4 |
| Moore, Frederick James | Great-granduncle | V | 4 |
| Moore, John | Great-granduncle | V | 4 |
| Moore, Richard | Great-granduncle | V | 4 |
| Moore, William | 2nd great-grandfather | IV | 4 |
| Morgan, Margaret Alice (Maggie) | Wife of the great-granduncle | | |
| Morris, Annie | Wife of the great-grandfather | | |
| Mortaigne, Agnes | 27th great-grandmother | XXIX | 29 |
| 28th great-grandmother | XXX | 30 |
| Mountjoy, Lucy | 19th great-grandmother | XXI | 21 |
| Mullins, George | Husband of the 8th great-grandaunt | | |
| Mytton, Joan | 13th great-grandmother | XV | 15 |
| Mytton, John | 14th great-grandfather | XVI | 16 |
| Napier, Sir John | Husband of the 6th great-grandaunt | | |
| Nash, Robert Spread | Husband of the 3rd great-grandaunt | | |
| Nesbett, Allan | 4th great-grandfather | VI | 6 |
| Nesbett, Ellen | 3rd great-grandmother | V | 5 |
| Neville, Elizabeth | 13th great-grandmother | XV | 15 |
| Newdegate, Anne | Wife of the 8th great-granduncle | | |
| Newman, Margaret | Wife of the 5th great-granduncle | | |
| Newmarch, Sibel | 26th great-grandmother | XXVIII | 28 |
| 27th great-grandmother | XXIX | 29 |
| Nugent, Elizabeth | 2nd great-grandaunt | VI | 5 |
| Nugent, Ellen Norah Rochester | 2nd great-grandmother | IV | 4 |
| Nugent, George | 2nd great-granduncle | VI | 5 |
| Nugent, James | 2nd great-granduncle | VI | 5 |
| Nugent, John | 3rd great-grandfather | V | 5 |
| Nugent, John | 2nd great-granduncle | VI | 5 |
| Nugent, Margaret | 2nd great-grandaunt | VI | 5 |
| Nugent, Margaret | 2nd great-grandaunt | VI | 5 |
| Nugent, Thomas | 2nd great-grandaunt | VI | 5 |
| Ogilvy, Gilles | 15th great-grandmother | XVII | 17 |
| Ogilvy, Walter | 16th great-grandfather | XVIII | 18 |
| Ogle, Sarah Rosanna | Wife of the 5th great-granduncle | | |
| O'Neil, Mary Ann Bridget | Wife of the 4th great-granduncle | | |
| O'Reilly, Francis | Husband of the 2nd great-grandaunt | | |
| Overton, Cecily | 15th great-grandmother | XVII | 17 |
| Overton, Thomas | 16th great-grandfather | XVIII | 18 |
| Page, Eliza | Wife of the 4th great-grandfather | | |