"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 and Brzeg from 1672 until his death. He was the last male member of the Silesian Piast dynasty descending from Władysław II the Exile (1105–1159)." - (en.wikipedia.org 31.01.2020)