The Trenck family is one of Prussia's preeminent aristocratic families of ancient nobility (Uradel). Over time, several family members were made Freiherrn and Grafen. Hereditary titles held by the v.d. Trenck gen. Stier family include Graf von der Trenck gen. Stier (since 5 June 1798) and Freiherr von der Trenck gen. Stier (permission granted by the King of Prussia on 9 May 1825). Notable family members are Friedrich Freiherr von der Trenck (1726–1794) and Franz Freiherr von der Trenck (1711–1749). Friedrich, the writer of the celebrated autobiography, was born on 16 February 1726 at Konigsberg, his father being a Prussian general. After distinguishing himself for his quickness and imagination at the university of Konigsberg, he entered the Prussian army in 1742, and soon became an orderly officer on King Frederick the Great's own staff. But within a year he fell into disgrace because of a love affair - whether real or imaginary - with the king's sister Princess Amalie. His autobiography, which has been translated into several languages, first appeared in German at Berlin and Vienna (13 vols.) in 1787. Shortly afterwards a French version, by his own hand, was published at Strassburg. His other published works are in eight volumes and appeared shortly after the autobiography at Leipzig. A reprint of the autobiography appeared in 1910 in "Reclam's Universal Series."