| Name | Relationship with Gilbert de Clare | Civil | Canon |
|---|
| Hayward, Nathan Jr. | 22nd great-grandson | XXIV | 24 |
| Heller, Glen Rolland | Husband of the 23rd great-granddaughter | | |
| Hemmeldarn, Donna Lee | Wife of the 23rd great-grandson | | |
| Henderson, Harriet Paulina | Wife of the 20th great-grandson | | |
| Heriot, Elphinstone Margaret | 21st great-granddaughter | XXIII | 23 |
| Heriot, Florence Edgar | 21st great-granddaughter | XXIII | 23 |
| Heriot, James | Husband of the 20th great-granddaughter | | |
| Heriot, James | 21st great-grandson | XXIII | 23 |
| Hickok, Frank | Husband of the 20th great-granddaughter | | |
| Hickok, Margaret | 21st great-granddaughter | XXIII | 23 |
| Hill, Eliza Adelaide | Wife of the 20th great-grandson | | |
| Hill, Richard | Husband of the 14th great-granddaughter | | |
| Hilleary, Barbara Jean | 23rd great-granddaughter | XXV | 25 |
| Hilleary, CH Kurt | 24th great-grandson | XXVI | 26 |
| Hilleary, Curtis Dean | 23rd great-grandson | XXV | 25 |
| Hilleary, Deana | 24th great-granddaughter | XXVI | 26 |
| Hilleary, Ronald Douglass | 23rd great-grandson | XXV | 25 |
| Hilleary, Shane | 24th great-grandson | XXVI | 26 |
| Hilleary, Stephan Edgar | Husband of the 22nd great-granddaughter | | |
| Hilleary, Tammy | 24th great-granddaughter | XXVI | 26 |
| Hilleary, Teana Lynn | 24th great-granddaughter | XXVI | 26 |
| Hilleary, Tina Lynn | 24th great-granddaughter | XXVI | 26 |
| Holcomb, Anna North | 21st great-granddaughter | XXIII | 23 |
| Holcomb, Charles Sears | 21st great-grandson | XXIII | 23 |
| Holcomb, Frederick Wainwright | 21st great-grandson | XXIII | 23 |
| Holcomb, Harry Alonzo | Husband of the 20th great-granddaughter | | |
| Holcomb, Harry Wainwright | 21st great-grandson | XXIII | 23 |
| Holcomb, Mary Rogers | 21st great-granddaughter | XXIII | 23 |
| Hollis, Brandon | 26th great-grandson | XXVIII | 28 |
| Hollis, Caitlyn | 26th great-granddaughter | XXVIII | 28 |
| Hood, Andrea | Wife of the 25th great-grandson | | |
| Hopkins, Rebecca | Wife of the 19th great-grandson | | |
| Hord, Arnold Harris | Husband of the 21st great-granddaughter | | |
| Hord, Frank Firth | 22nd great-grandson | XXIV | 24 |
| House, Frances Blackwood | Wife of the 20th great-grandson | | |
| Howell, Anna | 20th great-granddaughter | XXII | 22 |
| Howell, Charles Stratton | 20th great-grandson | XXII | 22 |
| Howell, Edward Carpenter | 20th great-grandson | XXII | 22 |
| Howell, Ehret | 22nd great-grandson | XXIV | 24 |
| Howell, Evelyn Virginia | 21st great-granddaughter | XXIII | 23 |
| Howell, Henry Elmer | 21st great-grandson | XXIII | 23 |
| Howell, Henry Elmer Jr. | 22nd great-grandson | XXIV | 24 |
| Howell, John Paschall | 20th great-grandson | XXII | 22 |
| Howell, Joshua Ladd | 20th great-grandson | XXII | 22 |
| Howell, Mortimer | 22nd great-grandson | XXIV | 24 |
| Howell, Richard | 22nd great-grandson | XXIV | 24 |
| Howell, Richard Holmes Offley | 20th great-grandson | XXII | 22 |
| Howell, Richard Washington | Husband of the 19th great-granddaughter | | |
| Howell, Richard Washington | 21st great-grandson | XXIII | 23 |
| Howell, Samuel Bedill | 20th great-grandson | XXII | 22 |
