| Name | Relationship with Gilbert de Clare | Civil | Canon |
|---|
| Lloyd, Thomas | 14th great-grandson | XVI | 16 |
| Lloyd, William | 16th great-grandson | XVIII | 18 |
| Logan, Jane Wilson | Wife of the 20th great-grandson | | |
| Long, Ada M. | 21st great-granddaughter | XXIII | 23 |
| Long, Thomas H. | Husband of the 20th great-granddaughter | | |
| Longman, James William | Husband of the 18th great-granddaughter | | |
| Longman, James William | 19th great-grandson | XXI | 21 |
| Lort, Elizabeth | Wife of the 13th great-grandson | | |
| Lovibond, Ann | Wife of the 17th great-grandson | | |
| Lowe, Clark E. | Husband of the 24th great-granddaughter | | |
| Lowell, Mary E. | Wife of the 21st great-grandson | | |
| Ludlow, Genevieve Sprigg | Wife of the 21st great-grandson | | |
| Lummis, Elizabeth Fries | Wife of the 19th great-grandson | | |
| Lunan, Ann | Wife of the 19th great-grandson | | |
| Lycett, Mary Foster | Wife of the 21st great-grandson | | |
| MaBee, Anthony Vinn | 23rd great-grandson | XXV | 25 |
| MaBee, Bonnita Lee | 24th great-granddaughter | XXVI | 26 |
| MaBee, Karen Louise | 23rd great-granddaughter | XXV | 25 |
| MaBee, Louis Franklin | 23rd great-grandson | XXV | 25 |
| MaBee, Robert | Husband of the 22nd great-granddaughter | | |
| MaBee, Robert Ervin | 23rd great-grandson | XXV | 25 |
| MaBee, Robert Ervin III | 24th great-grandson | XXVI | 26 |
| MaBee, Russell Martin | 24th great-grandson | XXVI | 26 |
| MaBee, Tracey Elaine | 24th great-granddaughter | XXVI | 26 |
| Mackey, John Albert | Husband of the 25th great-granddaughter | | |
| Mackey, Leslie Anne | 26th great-granddaughter | XXVIII | 28 |
| Maclean, Kenneth | Husband of the 18th great-granddaughter | | |
| Maclean, Mary Ann | 19th great-granddaughter | XXI | 21 |
| Mardee | Ex-wife of the 24th great-grandson | | |
| Margaret | Daughter-in-law | | |
| Marshall, Isabella | Wife | | |
| Martin, Alvin | Husband of the 22nd great-granddaughter | | |
| Martin, Nina Polk | Wife of the 20th great-grandson | | |
| Masson, Bessie Beatrice | Wife of the 21st great-grandson | | |
| Matheson, Margaret Agnes | Wife of the 20th great-grandson | | |
| Maud | Wife of the 2nd great-grandson | | |
| Maud | Wife of the 3rd great-grandson | | |
| Maury, Ellen | 21st great-granddaughter | XXIII | 23 |
| Maury, Henry Ellet | 21st great-grandson | XXIII | 23 |
| Maury, John Metcalfe | 21st great-grandson | XXIII | 23 |
| Maury, John Metcalfe | 22nd great-grandson | XXIV | 24 |
| Maury, Joseph Ellet | 21st great-grandson | XXIII | 23 |
| Maury, Kate Ellet | 21st great-granddaughter | XXIII | 23 |
| Maury, Richard B. | Husband of the 20th great-granddaughter | | |
| Maury, Richard Brooke | 21st great-grandson | XXIII | 23 |
| McCarraher, Helen Rosalie | Wife of the 20th great-grandson | | |
| McCollum, Catherine McGregor | Wife of the 20th great-grandson | | |
| McCorkell, Ann | 21st great-granddaughter | XXIII | 23 |
| McCorkell, Catherine Frances | 21st great-granddaughter | XXIII | 23 |
| McCorkell, Dolly | 22nd great-granddaughter | XXIV | 24 |
