1873 - 1955 (82 years)
| Robert Thornhill | |
| B: | 1906 |
| New York, United States | |
| D: | 1961 |
| Sayville, Islip Town, Suffolk, New York, United States | |
| Mary Bennett | |
| B: | Abt 1910 |
| D: | Yes, date unknown |
| Mary B Hodges | |
| B: | 1916 |
| D: | 1979 |
| Sewell E Thornhill | |
| B: | 1900 |
| New York, United States | |
| D: | 1932 |
| Louise Edwards | |
| B: | 1873 |
| New Jersey, United States | |
| D: | 1955 |
| Sewell Edwards Thornhill | |
| B: | 1865 |
| Wappingers Falls, Dutchess County, New York, United States of America | |
| D: | 4 Nov 1931 |
| Sayville, Suffolk, New York, USA | |
