John Boyd Davis
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 | Dorothy Howard Heckman 1926-1999 |
| Dorothy Howard Heckman | |
| B: | 20 Mar 1926 |
| , Saline, Missouri, United States | |
| D: | 20 Sep 1999 |
| Lexington, , Missouri, United States | |
 | Irvine Michael Hayes 1906-1965 |
| Irvine Michael Hayes | |
| B: | 22 Nov 1906 |
| D: | 18 Aug 1965 |
| Marshall, , Missouri, United States | |
| William Cecil Heckman 1900-1957 |
| William Cecil Heckman | |
| B: | 26 Dec 1900 |
| Napton, Saline, Missouri, United States | |
| D: | 15 Apr 1957 |
| Marshall, Saline, Missouri, United States | |
| Laila Maude Howard 1900-1973 |
| Laila Maude Howard | |
| B: | 1900 |
| , , Missouri, United States | |
| D: | 1973 |
| Marshall, Saline, Missouri, United States | |
| Zeleka Frances Smith Davis 1875-1947 |
| Zeleka Frances Smith Davis | |
| B: | 14 Mar 1875 |
| , Saline, Missouri, United States | |
| D: | 15 May 1947 |
| Napton, Saline, Missouri, United States | |
| William Francis Heckman 1870-1935 |
| William Francis Heckman | |
| B: | 25 Jan 1870 |
| , Saline, Missouri, United States | |
| D: | 15 Jun 1935 |
| , Saline, Missouri, United States | |