After George Frederick's death in 1603, the Polish king Zygmunt Waza appointed Joachim Frederick as regent in 1605, and permitted his son, John Sigismund, to succeed him in 1611.

Married Joachim Frederick, Elector of Brandenburg.

* 1569 / 71: Joachim Frederick, Elector of Brandenburg

** 1603 – 1608: Joachim I / I / III Frederick ( Regent, also Duke of Brandenburg-Jägerndorf and Elector of Brandenburg )

He was succeeded by his son Joachim Frederick.

# Joachim Frederick ( 27 January 1546 – 1608 )

Joachim III Frederick () ( 27 January 1546 – 18 July 1608 ), of the House of Hohenzollern, was Prince-elector of the Margraviate of Brandenburg from 1598 until his death.

Joachim III Frederick was born in Cölln to John George, Elector of Brandenburg, and Sophie of Legnica.

Joachim Frederick was succeeded at his death by his son John Sigismund.

Joachim Frederick's second marriage, on 23 October 1603, was to Eleanor of Prussia, born 12 August 1583, daughter of Albert Frederick and Marie Eleonore of Cleves.

Joachim Frederick and Catherine of Brandenburg-Küstrin had these children:

Joachim Frederick and Eleanor of Prussia had only one child:

John Sigismund was born in Halle an der Saale to Joachim Frederick, Elector of Brandenburg, and his first wife Catherine of Brandenburg-Küstrin.

Bodeck then became the chancellor to Elector Joachim Frederick of Brandenburg.

Frederick the Great playing a flute concerto in Sanssouci, Carl Philipp Emanuel Bach | C. P. E. Bach at the piano, Johann Joachim Quantz is leaning on the wall to the right ; by Adolph Menzel, 1852

On 19 July 1569, when Albert Frederick rendered King Sigismund II homage and was in return enfeoffed as Duke of Prussia in Lublin, the King simultaneously enfeoffed Joachim II and his descendants as co-heir.

Following King Sigismund III's Prussian regency contract ( 1605 ) with Joachim Frederick of Brandenburg and his Treaty of Warsaw, 1611, with John Sigismund of Brandenburg, confirming the Brandenburgian co-enfeoffment, these two regents guaranteed free practice of Catholic religion in prevailingly Lutheran Prussia.

In 1594, Albert Frederick's then 14-year-old daughter Anna married the son of Joachim Frederick of Hohenzollern-Brandenburg, John Sigismund.

Upon George Frederick's death in 1603, the regency of the Prussian duchy passed to Joachim Frederick.

To reduce the influence of the estates, Joachim Frederick in 1604 created a council called Geheimer Rat für die Kurmark (" Privy Council for the Electorate "), which instead of the estates was to function as the supreme advisory council for the elector.

In 1595 Brieg was again fortified by Joachim Frederick of Brieg and Liegnitz.

In 1537 the duke Frederick II of Liegnitz concluded a treaty with Elector Joachim II of Brandenburg, whereby the Hohenzollerns of Brandenburg would inherit the duchy upon the extinction of the Silesian Piasts.

Frederick determined to send General Hans Joachim von Zieten to hold Daun's attention from the south, while his main effort circled around the western end of the Austrian line to attack from the north.

Following King Sigismund III's contract on regency in Ducal Prussia ( 1605 ) with Joachim Frederick of Brandenburg, and his Treaty of Warsaw ( 1611 ) with John Sigismund of Brandenburg, confirming the co-enfeoffment of the Berlin Hohenzollern with Ducal Prussia, these two rulers guaranteed free practice of Catholic religion in all of prevailingly Lutheran Ducal Prussia.

Some notable collectors were Pope Boniface VIII, Emperor Maximilian of the Holy Roman Empire, Louis XIV of France, Ferdinand I, Henry IV of France and Elector Joachim II of Brandenburg, who started the Berlin Coin Cabinet ( German: Münzkabinett Berlin ).

* 1484 – Elector Joachim I of Brandenburg ( d. 1535 )

After the death of his cousin, Joachim I, who was a strict Romanist, he assisted his sons in the introduction of the Reformation in the territories of the Electorate of Brandenburg.

# Magdalena ( b. Dresden, 7 March 1507 – d. Berlin, 25 January 1534 ), married on 6 November 1524 to Joachim Hector, then Hereditary Elector of Brandenburg.

* 1603 – 1606: Joachim I / I / III ( also Regent of Prussia and Elector of Brandenburg )

* 1535 – 1571: John the Wise, Margrave of Brandenburg-Küstrin ( son of Joachim I Nestor, Elector of Brandenburg )

* 1568 – 1571: Joachim I / II Hector co-inheritor ( also Elector of Brandenburg )

Hedwig married Joachim II Hector, Elector of Brandenburg

* 1546 – Joachim Friedrich, Elector of Brandenburg ( d. 1608 )

Joachim II Hector, Elector of Brandenburg, having taken Agricola into his favour, appointed him court preacher and general superintendent.

* 1505 – Joachim II Hector, Elector of Brandenburg ( d. 1571 )

A member of the House of Hohenzollern, he was the son of Joachim II Hector, Elector of Brandenburg, and his first wife Magdalena of Saxony.

# Joachim I Nestor, Elector of Brandenburg ( 21 February 1484 – 11 July 1535 ), Elector of Brandenburg.

He died in 1499 from pleural effusion at Arneburg Castle and was succeeded by his eldest son Joachim I. John was the first of the Hohenzollern electors to be buried in Brandenburg, first at Lehnin Abbey, later transferred to Berlin Cathedral by order of his grandson Joachim II.

da: Joachim Frederik af Brandenburg

de: Joachim Friedrich ( Brandenburg )

nl: Joachim Frederik van Brandenburg