Johann von Mayr (1 May 1716 in Vienna--5 January 1759 in Plauen) and was also the head of a Prussian Freibataillon (``F 2'') that, during the Seven Years' War, formed part of the advanced guard of Frederick the Great's Prussian Army. He was the prototype of adventurer and mercenary. Johann von Mayr was a natural son of Count von Stella, a royal Spanish councilor in Vienna. His mother was from the bourgeois class and married the owner of a billiard parlor named Mayr soon after.
Johann von Mayr
Count von Stella