1840 - 1911 (70 years)
| Sewell E Thornhill | |
| B: | 1900 |
| New York, United States | |
| D: | 1932 |
| 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 Edwards Thornhill | |
| B: | 1865 |
| Wappingers Falls, Dutchess County, New York, United States of America | |
| D: | 4 Nov 1931 |
| Sayville, Suffolk, New York, USA | |
| Louise E. Edwards | |
| B: | 10 Feb 1870 |
| Paterson, New Jersey | |
| M: | 1 Feb 1899 |
| New Hamburg, New York, USA | |
| D: | 24 Sep 1955 |
| Sayville, Suffolk County, New York, United States of America | |
| 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 |
| William Thornhill | |
| B: | 1855 |
| New York, United States | |
| George Thornhill | |
| B: | 1857 |
| New York, United States | |
|
| Harriet Sewell | |
| B: | 4 May 1840 |
| Cheshire, England, United Kingdom | |
| D: | 1911 |
| James Thornhill | |
| B: | 1830 |
| England | |
| M: | 7 Jan 1864 |
| United States | |
| D: | Yes, date unknown |
