| Name | Birth date | Relationship with Arthur Belcher |
| Harvey, Permelia "Milly" | | Wife of the 3rd great-grandfather |
| | | Wife of the 3rd cousin 5 times removed |
| | | Wife of the 7th cousin 5 times removed |
| Hatfield, A. B. | 1899 | 2nd cousin twice removed |
| | | 6th cousin twice removed |
| | | 10th cousin twice removed |
| Hatfield, Abie | Abt. 1920 | 3rd cousin twice removed |
| | | 6th cousin twice removed |
| | | 10th cousin twice removed |
| Hatfield, Abner | Abt. 1782 | 1st cousin 7 times removed |
| | | 5th cousin 7 times removed |
| Hatfield, Abraham | Abt. 1718 | 7th great-granduncle |
| | | 3rd cousin 9 times removed |
| Hatfield, Abraham I | June 08, 1670 | 9th great-grandfather |
| | | 1st cousin 11 times removed |
| Hatfield, Abraham II | 1695 | 8th great-grandfather |
| | | 2nd cousin 10 times removed |
| | | Husband of the 2nd cousin 10 times removed |
| Hatfield, Adam Delano | July 05, 1961 | 3rd cousin once removed |
| | | 5th cousin once removed |
| | | 6th cousin once removed |
| | | 8th cousin once removed |
| | | 12th cousin once removed |
| Hatfield, Aimee | | 5th cousin once removed |
| | | 8th cousin once removed |
| | | 12th cousin once removed |
| Hatfield, Albert Allen | July 31, 1900 | 3rd cousin twice removed |
| | | 6th cousin twice removed |
| | | 10th cousin twice removed |
| Hatfield, Albert M. (Abb) | December 13, 1892 | 2nd cousin twice removed |
| | | 2nd cousin 3 times removed |
| | | 5th cousin 3 times removed |
| | | 6th cousin twice removed |
| | | 9th cousin 3 times removed |
| | | 10th cousin twice removed |
| Hatfield, Albert Warren | November 08, 1922 | 4th cousin once removed |
| | | 7th cousin once removed |
| | | 11th cousin once removed |
| Hatfield, Ale | October 29, 1778 | 5th great-granduncle |
| | | 1st cousin 7 times removed |
| | | 5th cousin 7 times removed |
| Hatfield, Alex | Abt. 1827 | 3rd great-granduncle |
| | | 3rd cousin 5 times removed |
| | | 7th cousin 5 times removed |
| Hatfield, Alexander | August 31, 1868 | 1st cousin 3 times removed |
| | | 5th cousin 3 times removed |
| | | 9th cousin 3 times removed |
| Hatfield, Ali | October 18 | 1st cousin 3 times removed |
| | | 5th cousin 3 times removed |
| | | 9th cousin 3 times removed |