Friedrich Freiherr von der Trenck (16 February 1726 – 25 July 1794) was a Prussian officer, adventurer, and author. The coat of arms of the Trenck family depicts in red the head of a silver bull with golden tongue and golden horns. Below there are two golden stars. The German word for "bull" is Stier which explains why the family was also known as Stier. Von der Trenck was born in Haldensleben, which is north of the city of Magdeburg, today in Saxony-Anhalt, then prussian ruled Duchy of Magdeburg, on 16 February 1727. His parents were Major-General Baron Christopher Ehrenreich von der Trenck and Marie Charlotte von Derschau. His father was transferred to Königsberg in 1729. Friedrich's grandfather was Albrecht Frederick von Derschau, who was President of the Royal Law Court in Königsberg.