Frederick William (German: Friedrich Wilhelm; 16 February 1620 – 29 April 1688) was Elector of Brandenburg and Duke of Prussia, thus ruler of Brandenburg-Prussia, from 1640 until his death in 1688. A member of the House of Hohenzollern , he is popularly known as " the Great Elector "  ( der Große Kurfürst ) because of his military and political achievements.
Five years later (27 June 1305) Apitz of Tenneberg died, aged thirty-five. The death of his favorite son was a terrible blow to Albert. He never recovered from the loss. Two years later, in 1307, Albert finally resigned the Landgraviate of Thuringia and the County Palatine of Saxony to his son Frederick in exchange for an annuity.
Linie Hohenzollern-Brandenburg (Von Albrecht Achilles bis Joachim Friedrich) Friedrich I. (Brandenburg) (1371–1440), Kurfürst von Brandenburg ⚭ Elisabeth von Bayern (1383–1442), Tochter von Friedrich (Bayern) (1339–1393), gen. der Weise; → Vorfahren siehe oben, Linie Hohenzollern-Nürnberg