Joachim Frederick, Elector of Brandenburg
Joachim Frederick, of the House of Hohenzollern, was Prince-elector of the Margraviate of Brandenburg from 1598 until his death.
Biography
Joachim Frederick was born in Cölln to John George, Elector of Brandenburg, and Sophie of Legnica. He served as administrator of the Archbishopric of Magdeburg from 1566 to 1598, then succeeded his father as Elector of Brandenburg in 1598. Joachim Frederick was succeeded at his death by his son John Sigismund. Joachim Frederick's first marriage on 7 March 1570 was to Catherine of Brandenburg-Küstrin, daughter of John, Margrave of Brandenburg-Küstrin, and Catherine of Brunswick-Wolfenbüttel.Joachim Frederick and Catherine of Brandenburg-Küstrin had these children:
- John Sigismund, Elector of Brandenburg
- Anne Catherine, married King Christian IV of Denmark
- Girl
- John George, Duke of Jägerndorf married Eva Christina of Württemberg, daughter of Frederick I, Duke of Württemberg and Sibylla of Anhalt. Elected Bishop of Strasbourg 1592; resigned 1604. Herrenmeister of the Order of Saint John from 1616 until his death.
- August Frederick
- Albert Frederick
- Joachim
- Ernest
- Barbara Sophie, married John Frederick, Duke of Württemberg
- Girl
- Christian William
Joachim Frederick and Eleanor of Prussia had only one child:
He became regent of the Duchy of Prussia in 1605.
His titles also included "duke of Stettin, Pomerania, Cassubia, Vandalorum and Crossen", according to the terms of the Treaty of Grimnitz, although the Pomeranian titles were only nominal.