| Father | John A. Harmon, Sr. (b. May 1790, d. 22 February 1871) |
| Mother | Elizabeth Comstock Clark (b. 9 May 1792, d. 24 April 1864) |
| Son | Reuben Mansom Harmon+ (b. 13 September 1851, d. 20 April 1929) |
| Pedigree Chart |
| Birth | 13 February 1816 | David Harmon was born on 13 February 1816 in Saint Martinville, St. Martin, Louisiana, United StatesBG. |
| Burial | October 1894 | He was buried in October 1894 in Oak Shade Cemetery, Cleveland, Liberty, Texas, United StatesBG. |
| Death | 10 October 1894 | He died on 10 October 1894 at age 78 in Cleveland, Liberty, Texas, United StatesBG. |
| Last Edited | 20 May 2022 |