Eleanor of Prussia
Eleanor of Prussia (German: Eleonore von Preußen; 21 August 1583 – 9 April 1607) was a princess of the Duchy of Prussia by birth and Electress of Brandenburg by marriage. Life 
Eleanor was the fourth daughter of Albert Frederick of Prussia (1553–1618), from his marriage to Marie Eleonore (1550–1608), daughter of Duke William "the Rich" of Jülich-Cleves-Berg. The princess grew up with her sisters in Königsberg Castle. She married Joachim Frederick, Elector of Brandenburg (1546–1608), in Berlin on 2 November 1603 as his second wife. They married for political reasons: on the one hand, Joachim Frederick hoped to strengthen his influence on Prussia, where he acted as regent for Eleanor's insane father; on the other hand, he hoped to gain control of Jülich-Cleves-Berg, Eleanor's maternal inheritance. Eleanor died at the age of 23 shortly after giving birth to her only child. She was buried on 26 April 1607 in the family crypt of the House of Hohenzollern in the Berlin Cathedral. Children 
From her marriage Eleanor had one daughter, Marie Eleonore, who married Count Palatine Louis Philip, Count Palatine of Simmern-Kaiserslautern in 1631. References and sources 
 Friederike Bornhak: Eleonora von Preussen: Kurfürstin von Brandenburg, zweite Gemahlin des kurfürsten Joachim Friedrich von Brandenburg, geboren 1583, gestorben 1607, S. Geibel, 1889
 Brozat, Dieter: Der Berliner Dom, Berlin, 1985, 
 Ernst Daniel Martin Kirchner: Die Kurfürstinnen und Königinnen auf dem Throne der Hohenzollern, part 2: Die letzten acht Kurfürstinnen, Berlin, 1867,  pp. 107-130 (with a portrait of Eleanor of Prussia). External links 
 Portrait of Eleanor of Prussia. 1583 births
1607 deaths
People from Königsberg
People from the Duchy of Prussia
Electresses of Brandenburg
House of Hohenzollern
16th-century German people
16th-century German women
17th-century German people
Daughters of monarchs
Burials at Berlin Cathedral