Masurenforschung
Familie: Sommer, Johann Käthner / Maruhn, Catherine (F1350)
Sommer, Johann (1806-1886) 
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Piechotka, Elsa (1810- )
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Sommer, Catherine (1830- )  |
| Sommer, Friedrich (1844- ) |
| Sommer, Wilhelm (1847- ) |
| Sommer, Louise (1849- ) |
| Sommer, Christoph (1850- ) |
| Sommer, Henriette (1853- ) |
| Maruhn, N.N. (1825- ) |
| Maruhn (marin), Regine (1850- ) |
| Maruhn, Johann Altsitzer (1852- ) |
| Sommer, Johann Käthner (1842- )
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| Maruhn, Catherine (1848- )
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| Sommer, Henriette (1872- ) |
| Sommer, Johann (1874- ) |
| Sommer, Carl ( -1877) |
| Sommer, Gustav (1877- ) |
| Sommer, Auguste (1879- ) |
| Sommer, Miehna (1881- ) |
| Sommer, Wilhelmine (1882-1882) |
| Sommer, Bertha (1884- ) |
| Sommer, Bertha ( -1885) |
| Sommer, Carl (1887- ) |