By the mid-1770s Hufnagel had become acquainted with Freiherr S. A. von Rottemburg who lived in Klemzig near Züllichau (then Neumark, today Poland).
Jonasz Szlichtyng (German: Jonas Schlichting) (Bukowiec, Lubusz Voivodeship 1592 - Sulechów 1661) was a Polish nobleman, theologian of the Socinian Polish Brethren and father of Krzysztof Szlichtyng.