1899 - 1984 (85 years)
| Alfred Lawrence Klaassen | |
| B: | 19 Jan 1928 |
| West Sayville, Islip, Suffolk, New York, United States | |
| D: | 21 May 2003 |
| Elena J. Klaassen | |
| B: | 28 Jul 1924 |
| West Sayville, Islip, Suffolk, New York, United States | |
| D: | 5 Jul 2013 |
| Zypherhills, Pasco, Florida, United States | |
| Jacob David Klaasen | |
| B: | 12 Jul 1923 |
| New York, United States | |
| D: | 2 Apr 2008 |
| West Sayville, Islip, Suffolk, New York, United States | |
|
| Neetlje "Nellie" Slager | |
| B: | 17 Feb 1899 |
| New York, United States | |
| D: | 15 Oct 1984 |
| Sayville, Islip, Suffolk, New York, United States | |
| Job David Klaassen | |
| B: | 26 Sep 1891 |
| Middelburg, Zeeland, Netherlands | |
| M: | Aug 1922 |
| West Sayville, Islip, Suffolk, New York, United States | |
| D: | 8 Jan 1942 |
