Peter Karl Christoph von Keith (Wikipedia) Peter Karl Christoph von Keith (24 May 1711 – 27 December 1756) was a Prussian statesman, military officer, and confidant of Crown Prince Frederick II, later known as Frederick the Great. Keith was of a branch of the Scottish Clan Keith, which granted him noble status, and was descendant from Scottish emigrants residing in Pomerania. Keith was initially introduced to the Prussian aristocracy by becoming a page to Frederick William I.