Masurenforschung
Familie: Sommer, Johann / Piechotka, Elsa (F1351)
Sommer, Michael (1775- ) 
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Laszig, Esther (1785- )
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| Piechotka, N.N. (1780- )
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Piechotka, Friedrich (1825- )  |
| Piechotka, Julie (1825- ) |
| Sommer, Johann (1806-1886)
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| Piechotka, Elsa (1810- )
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| Sommer, Catherine (1830- ) |
| Sommer, Friedrich (1844- ) |
| Sommer, Johann Käthner (1842- ) |
| Sommer, Wilhelm (1847- ) |
| Sommer, Louise (1849- ) |
| Sommer, Christoph (1850- ) |
| Sommer, Henriette (1853- ) |