| Name | Relationship with Wendy Libby | Civil | Canon |
| Harris, Grace | 7th cousin 3 times removed | XIX | 11 |
| Harris, Thomas | Husband of the 6th cousin 4 times removed | | |
| Hart, Elias | Husband of the 1st cousin 8 times removed | | |
| Hartwell, Almeda | Wife of the 4th cousin 4 times removed | | |
| Harwood, Ann | Wife of the 2nd cousin 7 times removed | | |
| Haskell, Albert A. | Husband of the 6th cousin twice removed | | |
| Haskell, Bethiah | Wife of the 2nd cousin 7 times removed | | |
| Haskell, Clayton William | 1st cousin once removed | V | 3 |
| Haskell, Harold W. | Husband of the grandaunt | | |
| Haskell, Harriet Marjorie | 2nd cousin | VI | 3 |
| Haskell, Martha | Wife of the 2nd cousin 6 times removed | | |
| Haskell, Michael Alonzo | 1st cousin once removed | V | 3 |
| Haskell, Sally | Wife of the 2nd cousin 6 times removed | | |
| Haskett, Sarah | Wife of the 2nd cousin 8 times removed | | |
| Hatch, Huldah Augusta | 8th cousin twice removed | XX | 11 |
| Hatch, John Quincy | Husband of the 7th cousin 3 times removed | | |
| Hatch, May Martindale | 8th cousin twice removed | XX | 11 |
| Hathaway, Unknown | Husband of the 7th cousin 3 times removed | | |
| Hathorne, Susannah | Wife of the 4th cousin 6 times removed | | |
| Hawkins, Fred Robert | 9th cousin once removed | XXI | 11 |
| Hawkins, Harold James | 9th cousin once removed | XXI | 11 |
| Hawkins, Helen Idella | 9th cousin once removed | XXI | 11 |
| Hawkins, Robert Siddell | Husband of the 8th cousin twice removed | | |
| Hawley, Ellen Celestia | Wife of the 6th cousin 4 times removed | | |
| Haydock, Homer H. | Husband of the 7th cousin once removed | | |
| Hayes, Abigail | Wife of the 5th cousin 5 times removed | | |
| Hayes, Catherine | Wife of the 6th cousin 3 times removed | | |
| Haynes, Thomas | 1st cousin 9 times removed | XIII | 11 |
| Haynes, William | Husband of the 8th great-grandaunt | | |
| Hayward, Daniel Gridley | 6th cousin 3 times removed | XVII | 10 |
| Hayward, John | 6th cousin 3 times removed | XVII | 10 |
| Hayward, Joseph Ingersoll | 6th cousin 3 times removed | XVII | 10 |
| Hayward, Mary Ann | 6th cousin 3 times removed | XVII | 10 |
| Hayward, Samuel | Husband of the 5th cousin 4 times removed | | |
| Hayward, Samuel H. | 6th cousin 3 times removed | XVII | 10 |
| Hayward, Sarah B. | 6th cousin 3 times removed | XVII | 10 |
| Hearst, John A. Livingston | 9th cousin once removed | XXI | 11 |
| Hearst, Robert Edward Ingersoll | 9th cousin once removed | XXI | 11 |
| Hearst, William Edmonston | Husband of the 8th cousin twice removed | | |
| Heath, Addie | Wife of the 6th cousin twice removed | | |
| Helyer, Experience | Wife of the 2nd cousin 7 times removed | | |
| Hemingway, Alice Maria | 9th cousin once removed | XXI | 11 |
| Hemingway, Catherine Rebecca | 9th cousin once removed | XXI | 11 |
| Hemingway, Donald Jerome | 9th cousin once removed | XXI | 11 |
| Hemingway, Ernest Wilson | 9th cousin once removed | XXI | 11 |
| Hemingway, Unknown | Husband of the 8th cousin twice removed | | |
| Henderson, Dora Davis | 8th cousin twice removed | XX | 11 |
| Henderson, Flora | Wife of the 5th cousin 3 times removed | | |
| Henderson, Frank Lowell | Husband of the 7th cousin 3 times removed | | |
| Henderson, Zoraida Lowell | 8th cousin twice removed | XX | 11 |