1876 - 1926 (49 years)
| Cornelius De Roo | |
| B: | 1902 |
| New York, United States | |
| Elsie C. De Roo | |
| B: | 1909 |
| New York, United States | |
| Ira "Harry" Marinus De Roo | |
| B: | 6 Nov 1898 |
| New York, United States | |
| D: | Jun 1975 |
| West Sayville, Suffolk, New York, United States | |
| Rosie Gertrude De Roo | |
| B: | May 1896 |
| New York, United States | |
|
| Gertrude van Ysseldyk | |
| B: | 7 Oct 1876 |
| Yerseke, Zeeland, Netherlands | |
| D: | 29 Mar 1926 |
| West Sayville, Suffolk, New York, United States | |
| Peter Jacob De Roo | |
| B: | 18 Sep 1872 |
| Holland, Netherlands | |
| M: | 18 Apr 1894 |
| West Sayville, Suffolk, New York, United States | |
| D: | 3 Apr 1960 |
| Oakdale, Islip, Suffolk, New York, United States | |
