1868 - Yes, date unknown
| Leslie C. Duffield | |
| B: | 1 Jun 1901 |
| Suffolk County, New York, USA | |
| D: | Oct 1973 |
| Holtsville, Suffolk, New York, USA | |
| Harry Duffield | |
| B: | Apr 1891 |
| Suffolk County, New York, USA | |
|
| Clara Ellen Newton | |
| B: | 21 Mar 1868 |
| Lake Grove, Suffolk, New York, USA | |
| D: | Yes, date unknown |
| Henry C. Duffield | |
| B: | Mar 1866 |
| Suffolk County, New York, USA | |
| M: | 1888 |
| Suffolk County, New York, USA | |
