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George William
Portrait of Georg William by Mathias Czwiczek, c. 1635
Elector of Brandenburg Duke of Prussia
Reign	23 December 1619 – 1 December 1640
Predecessor	John Sigismund
Successor	Frederick William
Born	(1595-11-13)13 November 1595 Berlin, Electorate of Brandenburg, Holy Roman Empire
Died	1 December 1640(1640-12-01) (aged 45) Königsberg, Duchy of Prussia
Burial	Königsberg Cathedral
Spouse	Elizabeth Charlotte of the Palatinate ​ ​ (m. 1616)​
Issue	Louise Charlotte, Duchess of Courland Frederick William, Elector of Brandenburg Hedwig Sophia, Landgravine of Hesse-Kassel
House	Hohenzollern
Father	John Sigismund, Margrave of Brandenburg
Mother	Anna of Prussia
Religion	Calvinist
Signature

George William (German: Georg Wilhelm; 13 November 1595 – 1 December 1640), of the Hohenzollern dynasty, was Margrave and Elector of Brandenburg and Duke of Prussia from 1619 until his death. His reign was marked by ineffective governance during the Thirty Years' War. He was the father of Frederick William, the "Great Elector".

Born in Cölln on the Spree (today part of Berlin), George William was the son of John Sigismund, Elector of Brandenburg and Anna of Prussia. His maternal grandfather was Albert Frederick, Duke of Prussia. In 1616, he married Elisabeth Charlotte of the Palatinate. Their only son Frederick William would later be known as the "Great Elector". Of his two daughters, the eldest, Louise Charlotte, married Jacob Kettler, Duke of Courland, and the younger, Hedwig Sophie, married William VI, Landgrave of Hesse-Kassel.^[1]

In 1619, George William inherited the Margravate of Brandenburg and the Duchy of Prussia, then a vassal of the Polish–Lithuanian Commonwealth, although his ownership was not confirmed by Sigismund III Vasa until September 1621. He proved a weak and ineffective ruler in a very difficult period of history; possession of Prussia involved him in the 1621 to 1625 Polish–Swedish War, since Gustavus Adolphus of Sweden was married to his sister Maria Eleonora.^[2]

During the Thirty Years' War, the Calvinist George William tried to remain neutral in the contest between the Catholic Emperor Ferdinand II, and his mostly Lutheran opponents. When the war shifted to northern Germany in 1625, this did not protect his lands from being looted by Imperial troops, and he was forced to take sides when Gustavus intervened in the Empire in 1630. However, this simply replaced one set of plunderers with another; Gustavus could not support so large an army, and his unpaid and unfed troops became increasingly mutinous and ill-disciplined.^[3]

After Gustavus was killed at Lützen in November 1632, George William joined the Swedish-backed Heilbronn League, until defeat at Nördlingen on 6 September 1634. Following the 1635 Peace of Prague, the League was dissolved, although by now Brandenburg's population had been decimated by the war.^[4]

Leaving his Catholic and pro-Imperial chief minister Schwarzenberg to run the government, George William withdrew in 1637 to the relatively untouched region of Prussia, where he lived in retirement until his death at Königsberg in 1640. He was succeeded by his far more accomplished son Frederick William.^[5]

• Clark, C (2008). Iron Kingdom: The Rise and Downfall of Prussia, 1600-1947. Harvard University Press. ISBN 978-0674023857.
• Johnson, Christopher H; Sabean, David Warren (2011). Sibling Relations and the Transformations of European Kinship, 1300-1900. Berghahn Books. ISBN 978-0857450463.
• O'Connell, Daniel Patrick (1968). Richelieu. Weidenfeld & Nicolson.
• Wedgwood, CV (1938). The Thirty Years War (2005 ed.). New York Review of Books. ISBN 978-1590171462.
• Wilson, Peter H. (2009). Europe's Tragedy: A History of the Thirty Years War. Allen Lane. ISBN 978-0-7139-9592-3.