| Name | Relationship with James L.Oliver | Civil | Canon |
|---|
| Hagar, Henry | 3rd great-granduncle | VII | 6 |
| Hagar, Henry | Great-granduncle | V | 4 |
| Half 2nd cousin 3 times removed | IX | 6 |
| Hagar, Horace | Great-granduncle | V | 4 |
| Half 2nd cousin 3 times removed | IX | 6 |
| Hagar, James | 3rd great-grandfather | V | 5 |
| Hagar, James Hatton | 4th great-grandfather | VI | 6 |
| Hagar, James Leo | 1st cousin once removed | V | 3 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, James Q. | Grandfather | II | 2 |
| Half 3rd cousin twice removed | X | 6 |
| Hagar, James Thomas | 3rd great-granduncle | VII | 6 |
| Hagar, James William | 2nd great-grandfather | IV | 4 |
| Husband of the half 1st cousin 4 times removed | | |
| Hagar, Jane Mary | 1st cousin once removed | V | 3 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, John 'jack' | 3rd great-grandaunt | VII | 6 |
| Hagar, John Michael | 1st cousin once removed | V | 3 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, Leo samuel | Granduncle | IV | 3 |
| Half 3rd cousin twice removed | X | 6 |
| Hagar, Lewis V. | Granduncle | IV | 3 |
| Half 3rd cousin twice removed | X | 6 |
| Hagar, Lewis Virgil | 1st cousin once removed | V | 3 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, Loretta Gertrude | Aunt | III | 2 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, Lousia | 3rd great-grandaunt | VII | 6 |
| Hagar, Mabel A | Grandaunt | IV | 3 |
| Half 3rd cousin twice removed | X | 6 |
| Hagar, Mary Gertrude | Great-grandaunt | V | 4 |
| Half 2nd cousin 3 times removed | IX | 6 |
| Hagar, Mary Helen | 1st cousin once removed | V | 3 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, Mary Lou | 1st cousin once removed | V | 3 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, Mary Rebecca | Aunt | III | 2 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, Matilda Ann | 3rd great-grandaunt | VII | 6 |
| Hagar, Matthew | 4th great-granduncle | VIII | 7 |
| Hagar, Matthias | 4th great-granduncle | VIII | 7 |
| Hagar, Michael | 3rd great-granduncle | VII | 6 |
| Hagar, Mildred Melissa | 3rd great-grandaunt | VII | 6 |
| Hagar, Nancy Ann | 2nd great-grandaunt | VI | 5 |
| Hagar, Nora Ann | 1st cousin once removed | V | 3 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, Ola Jeanne | 1st cousin once removed | V | 3 |
| Half 4th cousin once removed | XI | 6 |
| Hagar, Paul A. | Granduncle | IV | 3 |
| Half 3rd cousin twice removed | X | 6 |
