David Stephan
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| Katherine Mertz | 
| Katherine Mertz | |
| B: | 1911 | 
| New York, USA | |
| D: | 25 Jun 2000 | 
| Fort Lauderdale, Broward County, Florida, USA | |
| Raymond Albert Coyle | 
| Raymond Albert Coyle | |
| B: | 10 Oct 1905 | 
| New York, USA | |
| M: | 16 Jun 1929 | 
| Westchester County, New York, USA | |
| D: | Feb 1971 | 
| New York, USA | |
| Valentine Walter Mertz | 
| Valentine Walter Mertz | |
| B: | 19 Apr 1886 | 
| New York, USA | |
| D: | 8 Nov 1965 | 
| Frances Frischmann | 
| Frances Frischmann | |
| B: | Mar 1887 | 
| Yonkers, Westchester County, New York, USA | |
| Marian Mertz | 
| Marian Mertz | |
| B: | 13 Mar 1912 | 
| New York, USA | |
| D: | 0Jan 1978 | 
| John Frederick Koehler | 
| John Frederick Koehler | |
| B: | 14 Sep 1906 | 
| New York, USA | |
| M: | 14 Mar 1931 | 
| New York, USA | |
| D: | 0Aug 1979 | 
| Valley Stream, Nassau County, New York, USA | |
| Ernest Mertz | 
| Ernest Mertz | |
| B: | 19 Sep 1887 | 
| New York, USA | |
| D: | 0May 1968 | 
| Margaret Mertz | 
| Margaret Mertz | |
| B: | 0Oct 1890 | 
| New York, USA | |
| Louisa Mertz | 
| Louisa Mertz | |
| B: | 0Nov 1894 | 
| New York, USA | |
| Katherine Mertz | 
| Katherine Mertz | |
| B: | 6 May 1897 | 
| Manhattan, New York City, New York, USA | |
| Margaretha Stephan | 
| Margaretha Stephan | |
| B: | 1862 | 
| Bergzabern, Pfalz, Bayern | |
| D: | New York, USA | 
| Valentin Mertz | 
| Valentin Mertz | |
| B: | Jun 1858 | 
| Pleisweiler, Pfalz, Bayern | |
| M: | 19 Sep 1885 | 
| Manhattan, New York City, New York, USA | |
| D: | 1901 | 
| New York, USA | |
| Johannes Schmidt | 
| Johannes Schmidt | |
| B: | 1859 | 
| Deutschland | |
| D: | 31 Dec 1919 | 
| New York, USA | |



