| Name | Relationship with Wendy Libby | Civil | Canon |
| Ingersoll, Abraham, Jr. | 4th cousin 5 times removed | XV | 10 |
| Ingersoll, Abram Anderson | 6th cousin 4 times removed | XVIII | 11 |
| Ingersoll, Ada Belle | 5th cousin 3 times removed | XV | 9 |
| Ingersoll, Ada May | 7th cousin once removed | XVII | 9 |
| Ingersoll, Ada Susannah | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Addie Maria | 6th cousin 3 times removed | XVII | 10 |
| Ingersoll, Adelaide A. | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Adelaide A. | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Adelaide M. | 5th cousin 3 times removed | XV | 9 |
| Ingersoll, Adelaide Woodbury | 5th cousin 3 times removed | XV | 9 |
| Ingersoll, Affa Jane | 6th cousin twice removed | XVI | 9 |
| Ingersoll, Agatha Irene | 6th cousin twice removed | XVI | 9 |
| Ingersoll, Albert | 5th cousin 3 times removed | XV | 9 |
| Ingersoll, Albert Clayton | 6th cousin twice removed | XVI | 9 |
| Ingersoll, Albert Kirkland | 5th cousin 5 times removed | XVII | 11 |
| Ingersoll, Alberta | 6th cousin twice removed | XVI | 9 |
| Ingersoll, Alexander | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Alexander | 6th cousin 3 times removed | XVII | 10 |
| Ingersoll, Alfred | 3rd cousin 5 times removed | XIII | 9 |
| Ingersoll, Alfred Lothrop | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Alfred Mason | 7th cousin 3 times removed | XIX | 11 |
| Ingersoll, Alfred W. | 6th cousin twice removed | XVI | 9 |
| Ingersoll, Alfred Worcester | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Alice | 8th great-grandaunt | XII | 11 |
| Ingersoll, Alice Bertha | 8th cousin once removed | XIX | 10 |
| Ingersoll, Alice Cornelia | 4th cousin 4 times removed | XIV | 9 |
| Ingersoll, Alice Evelyn | 8th cousin | XVIII | 9 |
| Ingersoll, Alice Lora | 8th cousin twice removed | XX | 11 |
| Ingersoll, Alice Medifer | 5th cousin 3 times removed | XV | 9 |
| Ingersoll, Alice Roselia | 5th cousin 3 times removed | XV | 9 |
| Ingersoll, Allan Parkhurst | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Allen McKinney | 8th cousin twice removed | XX | 11 |
| Ingersoll, Alline E. | 5th cousin 3 times removed | XV | 9 |
| Ingersoll, Alma Cecil | 8th cousin twice removed | XX | 11 |
| Ingersoll, Alma Corene | 7th cousin twice removed | XVIII | 10 |
| Ingersoll, Alma Ida | 5th cousin 3 times removed | XV | 9 |
| Ingersoll, Almenda Longfellow | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Almon | 5th cousin 5 times removed | XVII | 11 |
| Ingersoll, Alvenas | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Alzada | 4th cousin 4 times removed | XIV | 9 |
| Ingersoll, Amelia | 5th cousin 5 times removed | XVII | 11 |
| Ingersoll, Amos | 6th cousin 3 times removed | XVII | 10 |
| Ingersoll, Amos F. | 7th cousin twice removed | XVIII | 10 |
| Ingersoll, Amos M. | 5th cousin 4 times removed | XVI | 10 |
| Ingersoll, Amy Woodley | 6th cousin 3 times removed | XVII | 10 |
| Ingersoll, Andrew | 2nd cousin 6 times removed | XII | 9 |
| Ingersoll, Andrew | 1st cousin 7 times removed | XI | 9 |
| Ingersoll, Ann | Half 4th great-grandaunt | VIII | 7 |
| Ingersoll, Ann | 3rd cousin 4 times removed | XII | 8 |
| Ingersoll, Ann | 3rd cousin 6 times removed | XIV | 10 |