Pedigree

        /Friedrich Dettmer
    /Friedrich Dettmer
   |   |    /Johann Ketz
   |    \Louise Ketz
   |        \Ewa Tischmann
Wilhelmine Dettmer
   |        /Michael Kaiser
   |    /Friedrich Kaiser
   |   |    \Louisa Kilwinski
    \Wilhelmine Auguste Kaiser
       |    /George Pietrowski
        \Justine Pietrowski
            \Gottlieb Knuth

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