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George IV William | |
|---|---|
| Duke of Legnica, Brzeg | |
 Georgius Wilhelmus D.G. Dux Silesiae, engraving by Jan Tscherning (1650–53) | |
| Born | 26 September 1660 Oława, Duchy of Legnica, Crown of Bohemia (now in Poland) |
| Died | 21 November 1675 (aged 15) Brzeg, Duchy of Brzeg, Crown of Bohemia (now in Poland) |
| Buried | Church of St. John in Legnica |
| Noble family | Silesian Piasts |
| Father | Christian, Duke of Brieg |
| Mother | Louise of Anhalt-Dessau |
George William (German: Georg Wilhelm), also known as George IV William (Polish: Jerzy IV Wilhelm; 29 September 1660 – 21 November 1675) was the last Silesian duke of Legnica (Liegnitz) and Brzeg (Brieg) from 1672 until his death. He was the last male member of the Silesian Piast dynasty descending from Władysław II the Exile (1105–1159), as well as the last legitimate male member of the entire House of Piast.