This genealogy traces family histories in Upper Silesia, highlighting ancestry connections from the 1700s.
'The Dorschke’s of Upper Silesia: A Genealogy of the Dorschke’s, Drozdzok’s, Mandrisch’s, Buron’s, Zemelka's, Niestroy’s, Kokot's, Kordula's, Niewrzoll's, Swienty's, etc., with some families tracing to the 1700’s.' Published in Durango, Mexico.
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Brian Paul Kaess (2025) studied this question.
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