question: Who is Wenceslaus Ii, Duke Of Cieszyn's paternal grandfather?
context: [["Casimir II, Duke of Cieszyn", ["Casimir II of Cieszyn  (\u2013 13 December 1528) was a Duke of Cieszyn since 1477, ruler over Ko\u017ale during 1479\u20131509, since 1493 ruler over Wo\u0142\u00f3w, over Pszczyna during 1498\u20131517, from 1506 over Opava, Duke of G\u0142og\u00f3w since 1506 (for life).", "Also he was Landeshauptmann General of Silesia during 1497\u20131504 and 1507\u20131517, since 1517 until his death, Landeshauptmann over the Upper Silesia.", "He was the eldest child and only son of Boles\u0142aw II, Duke of Cieszyn, by his wife Anna, daughter of Ivan Vladimirovich, Prince of Bielsk."]], ["Frederick of Cieszyn", ["Frederick of Cieszyn( b. 1480/83- d. June 1507), was a Polish prince member of the House of Piast in the Cieszyn branch.", "He was the eldest son of Casimir II, Duke of Cieszyn, by his wife Johanna, daughter of Wiktoryn of Pod\u011bbrady, Duke of Opawa."]], ["Wenceslaus II, Duke of Cieszyn", ["Wenceslaus II of Cieszyn", "(b. 1488/96 - d. 17 November 1524), was a Duke of Cieszyn since 1518 until his death (as co-ruler of his father).", "He was the second son of Casimir II, Duke of Cieszyn, by his wife Johanna, daughter of Wiktoryn of Pod\u011bbrady, Duke of Opawa."]], ["Margaret of Bohemia, Duchess of Wroclaw", ["Margaret of Bohemia( 21 February 1296 \u2013 8 April 1322) was a daughter of Wenceslaus II of Bohemia and his first wife, Judith of Habsburg."]], ["Hedwig of Cieszyn", ["Hedwig of Cieszyn( 1469 \u2013 6 April 1521) was a Polish princess.", "She was the only child of Przemys\u0142aw II, Duke of Cieszyn by his wife Anna, daughter of Duke Boles\u0142aw IV of Warsaw."]], ["Elizabeth Lucretia, Duchess of Cieszyn", ["Elizabeth Lucretia of Cieszyn; 1 June 1599 \u2013 19 May 1653), was a reigning Duchess of Cieszyn( Teschen, T\u011b\u0161\u00edn) from 1625 until her death.", "Born as the third child and second daughter of Adam Wenceslaus, Duke of Cieszyn( by his wife Elisabeth, daughter of Gotthard Kettler, Duke of Courland), she was the last ruler of Cieszyn from the Polish Piast dynasty."]], ["Adam Wenceslaus, Duke of Cieszyn", ["Adam Wenceslaus of Cieszyn( 12 December 1574 \u2013 13 July 1617), was a Duke of Cieszyn from 1579 until his death.", "He was the second but only surviving son of Wenceslaus III Adam, Duke of Cieszyn, by his second wife Sidonia Katharina, daughter of Francis I, Duke of Saxe- Lauenburg.", "His older half- brother, Frederick Casimir, only son of Wenceslaus III Adam's first marriage, died a few years before he was born, in 1571."]], ["Wenceslaus II of Legnica", ["Wenceslaus II, Duke of Legnica( 1348 \u2013 30 December 1419) was a Duke of Legnica from 1364( only nominal; from 1409 he reigned alone and personally) until 1413, Bishop of Lebus( 1375 \u2013 82) and Breslau( Wroclaw)( 1382 \u2013 1417; also Duke of Nysa-Otmuch\u00f3w.", "He was the second son of Wenceslaus I of Legnica, by his wife Anna, daughter of Casimir I, Duke of Cieszyn."]], ["Casimir I, Duke of Cieszyn", ["Casimir I of Cieszyn( 1280/90 \u2013), was Duke of Cieszyn from 1315, Duke of Siewierz from 1337 and Duke of Bytom from 1357.", "He was the second son of Mieszko I, Duke of Cieszyn by his wife, probably called Grzymis\u0142awa."]], ["Wenceslaus III Adam, Duke of Cieszyn", ["Wenceslaus III Adam of Cieszyn (December 1524 \u2013 4 November 1579) was a Duke of Cieszyn from 1528 until his death.", "He was the second but only surviving son of Wenceslaus II, co-Duke of Cieszyn, by his wife Anna, daughter of Frederick I, Margrave of Brandenburg-Ansbach.", "He was born one month after his father's death, on 17 November 1524."]]]
supporting_facts: [["Wenceslaus II, Duke of Cieszyn", 2], ["Casimir II, Duke of Cieszyn", 2]]
evidences: [["Wenceslaus II of Cieszyn", "father", "Casimir II, Duke of Cieszyn"], ["Casimir II, Duke of Cieszyn", "father", "Boles\u0142aw II, Duke of Cieszyn"]]
answer: Bolesław II, Duke of Cieszyn