Bolko III of Strzelce
Bolko III of Strzelce( also known as of Opole;; – 21 October 1382) was a Duke of Opole during 1356 – 1370( with his brothers as co-rulers) and Duke of Strzelce from 1375 until his death.
He was the second son of Duke Bolko II of Opole by his wife Elisabeth, daughter of Duke Bernard of Świdnica.
Henry of Opole
Henry of Opole( b. – d.), was a Duke of Opole from 1356 until his death.
He was the third and youngest son of Duke Bolko II of Opole and his wife Elisabeth, daughter of Duke Bernard of Świdnica.
Louis of Opole
Louis of Opole( b. 1450 – d. by 4 September 1476), was a Duke of Opole- Brzeg- Strzelce- Niemodlin during 1466 – 1476( as co-ruler of his father) and briefly in 1476( with his brothers as co-rulers).
He was the eldest son of Duke Nicholas I of Opole by his wife Agnes, daughter of Duke Louis II of Brzeg.
He was named after his maternal grandfather.
Jan I of Opole
Jan I of Opole( 1410/1413 – 5 September 1439) was a Duke of Opole since 1437( with his brother as co-ruler).
He was the second son of Duke Bolko IV of Opole by his wife Margareta, possibly member of the House of Görz.
Jan II the Good
Jan II of Opole( – 27 March 1532) was a Duke of Opole- Brzeg( until 1481)- Strzelce- Niemodlin in 1476( with his brothers as co-rulers during 1476), ruler over Gliwice( in 1494), Toszek( in 1495), Niemodlin( again, in 1497), Bytom( in 1498), Koźle( in 1509), and Racibórz( in 1521).
He belonged to the silesian branch of the Polish Piast dynasty which was the oldest branch of the first Polish royal dynasty.
He was born as the second son of Duke Nicholas I of Opole by his wife Agnes, daughter of Duke Louis II of Brzeg.
Euphrosyne of Opole
Euphrosyne of Opole( and," YefrosiniyaFrosya")( 1228/30 – 4 November 1292) was a daughter of Casimir I of Opole and his wife Viola, Duchess of Opole.
She was a member of the House of Piast and became Duchess of Kujavia from her first marriage and Duchess of Pomerania from her second marriage.
Nicholas II of Niemodlin
Nicholas II of Niemodlin( – 27 June 1497), was a Duke of Opole- Brzeg- Strzelce- Niemodlin in 1476( as co-ruler of his father) and sole Duke of Niemodlin from 1476 until his death.
He was the third son of Duke Nicholas I of Opole by his wife Agnes, daughter of Duke Louis II of Brzeg.
Vladislaus II of Opole
Vladislaus II of Opole  (ca. 1332 – 18 May 1401) was a Duke of Opole from 1356 (as a Bohemian vassal), Count palatine of Hungary during 1367–1372, ruler over Lubliniec since 1368, Duke of Wieluń during 1370–1392, ruler over Bolesławiec from 1370 (only for his life), Governor of Galicia–Volhynia during 1372–1378, ruler over Pszczyna during 1375–1396, Count palatine of Poland in 1378, Duke of Dobrzyń and Kujawy during 1378–1392 (as a Polish vassal), ruler over Głogówek from 1383 and ruler over Krnov during 1385–1392.
Vladislaus was the eldest son of Duke Bolko II of Opole by his wife Elisabeth, daughter of Duke Bernard of Świdnica.
Bolko II of Opole
Bolko II of Opole (before 1300 – 21 June 1356), was a Duke of Opole from 1313 (with his brother as co-ruler until 1323).
He was the second son of Duke Bolko I of Opole by his wife Agnes, probably a daughter of Margrave Otto III of Brandenburg.
Casimir I of Opole
Casimir I of Opole( – 13 May 1230), a member of the Piast dynasty, was a Silesian duke of Opole and Racibórz from 1211 until his death.

Question: Who is Vladislaus Ii Of Opole's paternal grandfather?
Answer: Bolko I of Opole