The Lestwitz's were an old Silesian family, dating to the 14th century with Hannes, a free man who served the Duke of Silesia. Hans Sigismund von Lestwitz was born on 19 June 1718 in
Kontoppe,
Duchy of Glogau, part of the Brandenburg
Neumark. His father,
Johann Georg von Lestwitz, was a lieutenant general in the Prussian Army and his mother, Helen, was Baroness von Kottwitz. As a youth, Lestwitz studied at the University of Frankfurt. Lestwitz's military career emulated that of the sons of other
Junkers. Many of the
Junkers owned immense
estates, especially in the north-eastern part of Prussia (i.e. the provinces of
Brandenburg,
Pomerania,
Silesia,
West Prussia,
East Prussia and
Posen). Their younger sons frequently followed careers as soldiers, starting as
Fahnenjunker and accepting commissions in various branches of the military. With so many family members pursuing profitable careers in the military, the
Junkers became heavily invested in the success of the Prussian state. Lestwitz married Catharina Charlotte von Tresckow (1734–1789), and they had one daughter, Helene Charlotte (1754–1803). Charlotte married at the age of 16, but the marriage was later annulled. Based on his successful career in the army, especially during the latter years of the
Seven Years' War, Lestwitz was able to invest in property, eventually acquiring substantial holdings near
Friedland, both via purchase and gifts from his grateful king. The property, referred to as
Old Friedland, included six farms, several sheep and cow herds and a mill, plus assorted fishing communities. Fishing employed a third of the population until the end of the century. Eventually his daughter inherited the estates. She drained much of the marshland, creating a more profitable environment. Charlotte, known by decree of
Frederick William II as the Lady of Friedland, was widely considered to be a successful agriculturalist, albeit a "very strange woman." ==Military career==