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Albert Frederick, Duke of Prussia

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Title: Albert Frederick, Duke of Prussia  
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Subject: Albert, Duke of Prussia, John Sigismund, Elector of Brandenburg, Maria Eleonora of Brandenburg, Jacob Kettler, Frederick William, Elector of Brandenburg
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Albert Frederick, Duke of Prussia

Albert Frederick
Duke of Prussia
Reign 1568–1618
Predecessor Albert
Successor John Sigismund
Born (1553-05-07)7 May 1553
Died 28 August 1618(1618-08-28) (aged 65)
Spouse Marie Eleonore of Cleves
Issue Anna, Duchess of Prussia
Marie, Margravine of Brandenburg-Bayreuth
Duke Albert Frederick
Sophie, Duchess of Courland
Eleonore, Electress of Brandenburg
Prince Wilhelm
Magdalene Sibylle, Electress of Saxony
House House of Hohenzollern
Father Albert of Prussia
Mother Anna Marie of Brunswick-Lüneburg

Albert Frederick German: Albrecht Friedrich, Polish: Albrecht Fryderyk; 7 May 1553 in Königsberg – 28 August 1618 in Fischhausen (Rybaki) was Duke of Prussia from 1568 until his death. He was a son of Albert of Prussia and Anna Marie of Brunswick-Lüneburg. He was the second and last Prussian duke of the Ansbach branch of the Hohenzollern family.

Duke of Prussia

Albert became Duke of Prussia after paying feudal homage to the King of Poland, Zygmunt August (Ducal Prussia was a fief of Poland), on July 19, 1569 in Lublin.[1] The homage was described by the Polish chronicler Jan Kochanowski in his work Proporzec ("Standard"). During the 1573 Polish election, Albert Frederick attempted to gain acceptance to the Polish senate but was opposed by the powerful Jan Zamoyski (later Grand Hetman of the Crown of the Kingdom of Poland) who feared the influence of Protestants in the Polish legislative body. Albert Frederick initially refused to recognize the election of Stefan Bathory and supported the candidacy of Maximilian of Habsburg. However, at the Toruń sejm of October 1576 he gave his support to the new monarch.

As the great grandson of the Polish king Casimir IV Jagiellon, and as a Duke in Prussia who was fluent in Polish, Albert Frederick was seriously considered for a time as a possible candidate for the Polish throne. He particularly enjoyed the support of Polish Lutherans.

In 1572 he began to exhibit signs of mental disorder. In early 1578, the regency was taken over by his cousin, Sigismund III Vasa appointed Joachim Frederick as regent in 1605, and permitted his son, John Sigismund, to succeed him in 1611. The latter became Duke of Prussia after Albert Frederick's death in 1618.[2]


Albert Frederick was married in 1573 to Marie Eleonore of Cleves, a daughter of Wilhelm, Duke of Jülich-Cleves-Berg and Archduchess Maria of Austria (1531–1581). Maria was a daughter of Ferdinand I, Holy Roman Emperor and Anna of Bohemia and Hungary.


Albert Frederick and Marie were parents to seven children:

  1. Anna of Prussia (3 July 1576 – 30 August 1625). Married John Sigismund, Elector of Brandenburg.
  2. Marie of Prussia (23 January 1579 – 21 February 1649). Married Christian, Margrave of Brandenburg-Bayreuth.
  3. Albert Frederick of Prussia (1 June – 8 October 1580).
  4. Sophie of Prussia (31 March 1582 – 4 December 1610). Married Wilhelm Kettler of Courland.
  5. Eleanor of Prussia (22 August 1583 – 31 March/9 April 1607). Married Joachim Frederick, Elector of Brandenburg.
  6. Wilhelm of Prussia (23 June 1585 – 18 January 1586).
  7. John George I, Elector of Saxony.

At his death, the duchy passed to his son-in-law John Sigismund, Margrave of Brandenburg, combining the two territories under a single dynasty and forming Brandenburg-Prussia.



  1. ^
  2. ^
Albert Frederick, Duke of Prussia
Born: 7 May 1553 Died: 28 August 1618
Regnal titles
Preceded by
Duke of Prussia
Succeeded by
John Sigismund
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