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1875 - Abt 1965 (~ 91 years)(Notes: You may have to scroll down or right to see chart.)
| Estelle Koss 1904-Yes, date unknown |
| Estelle Koss | |
| B: | Between 1903 and 1904 |
| New York | |
| D: | Yes, date unknown |
Unknown Rosenberg -Yes, date unknown |
| Unknown Rosenberg | |
| D: | Yes, date unknown |
| David Koss 1905-1960 |
| David Koss | |
| B: | 10 Aug 1905 |
| New York | |
| D: | 1960 |
| Leon Koss 1908-1978 |
| Leon Koss | |
| B: | 17 Dec 1908 |
| New York | |
| D: | Nov 1978 |
| Nassau County, NY | |
| Harry Calvin Koss 1912-1979 |
| Harry Calvin Koss | |
| B: | 26 Jul 1912 |
| New York, NY | |
| D: | 25 Dec 1979 |
| Woodmere, NY | |
| Sylvia Behr 1908-1991 |
| Sylvia Behr | |
| B: | 24 Feb 1908 |
| New York, NY | |
| D: | 27 Oct 1991 |
| Laguna Hills, CA | |
| Unknown Koss Aft 1901-Bef 1910 |
| Unknown Koss | |
| B: | Aft 1901 |
| New York | |
| D: | Bef 1910 |
| New York | |
|
| Gussie Susskind 1875-Abt 1965 |
| Gussie Susskind | |
| B: | Between 1874 and 1875 |
| Krakow | |
| D: | Abt 11 Apr 1965 |
| Nathan Koss 1869-1927 |
| Nathan Koss | |
| B: | 1869 |
| Krakow | |
| D: | 18 Feb 1927 |
| Queens, NY | |
