• Frederick William I, Duke of Saxe-Weimar
  Frederick William I, Duke of Saxe-Weimar
  Frederick William I , was a duke of Saxe-Weimar. He was the eldest son of John William, Duke of Saxe-Weimar and Dorothea Susanne of Simmern.-Life:...
  
   (1562 - 1602)
• Frederick William, Elector of Brandenburg
  Frederick William, Elector of Brandenburg
  |align=right|Frederick William was Elector of Brandenburg and Duke of Prussia – and thus ruler of Brandenburg-Prussia – from 1640 until his death. A member of the House of Hohenzollern, he is popularly known as the "Great Elector" because of his military and political prowess...
  
  , the "Great Elector" of Brandenburg-Prussia (1620–1688)
• King Frederick William I of Prussia
  Frederick William I of Prussia
  Frederick William I of the House of Hohenzollern, was the King in Prussia and Elector of Brandenburg from 1713 until his death...
  
   (1688–1740)
• Frederick William, Elector of Hesse
  Frederick William, Elector of Hesse
  Frederick William I was, between 1847 and 1866, the last Elector of Hesse-Kassel .- Life :...
  
   (1802 – 1875)

See also

• Frederick William (disambiguation)
• Friedrich Wilhelm (disambiguation)