Mary Retzler
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| Mary Retzler | 
| Mary Retzler | |
| B: | 1 Jun 1868 | 
| Allegheny County, Pennsylvania, USA | |
| D: | Allegheny County, Pennsylvania, USA | 
| Joseph Singer | 
| Joseph Singer | |
| B: | 10 Sep 1858 | 
| Fulda, Enoch Township, Noble County, Ohio, USA | |
| M: | 16 Nov 1890 | 
| Pittsburgh, Allegheny County, Pennsylvania, USA | |
| D: | 12 Mar 1893 | 
| Allegheny County, Pennsylvania, USA | |
| Johannes Ludwig Schäfer | 
| Johannes Ludwig Schäfer | |
| B: | 27 Jan 1857 | 
| Deutschland | |
| M: | 24 Aug 1896 | 
| Allegheny County, Pennsylvania, USA | |
| D: | Allegheny County, Pennsylvania, USA | 



