"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 ...
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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)
