Frederick William of Cieszyn (Polish: Fryderyk Wilhelm cieszyński, Czech: Bedřich Vilém (Těšín), German: Friedrich Wilhelm (Teschen); b. 9 November 1601 - d. 19 August 1625) was a Duke of Cieszyn since 1617 until his death. He was the third but only surviving son of Adam Wenceslaus, Duke of Cieszyn, by his wife Elisabeth, daughter of Gotthard Kettler, Duke of Courland. His mother died from childbirth complications ten days after his birth, on 19 November 1602.