I am personally not descended from the Pfretzschner family, but my ggg-grandmother Margarethe Barbara wid. Herzog nee Flemming married Heinrich 'Gottfried' Pfretzschner (born 5 Aug 1784 Weismain died 21 Aug 1852 Kronach). His descendants were local industrialists and bankers, and had close political connection. He was also an uncle of King Ludwig II's Prime minister Adolph Freiherr v. Pfretzschner.
Please refer also to the article:
Pfretzschner, Karl: Ahnen prominenter Bayern.VIII. Die Pfretzschner-Ahnen d. Bayer. Ministerratsvorsitzenden Adolph Freiherr v. Pfretzschner
(In: Blätter des Bayerischen Landesvereins für Familienkunde 1989, p. 84).