"Wilhelm von Grumbach (1 June 1503 – 18 April 1567) was a German adventurer, chiefly known through his connection with the so-called “Grumbach Feud” (German: Grumbachsche Händel), the last attempt of the Imperial Knights to prevail against the power of the territorial Princes of the Holy Roman Empire." - (en.wikipedia.org 31.01.2020)
