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 Poděbrady, Duke of Opawa.
Elizabeth Lucretia, Duchess of Cieszyn
Elizabeth Lucretia of Cieszyn; 1 June 1599 – 19 May 1653), was a reigning Duchess of Cieszyn( Teschen, Těšín) 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.
Bolesław of Cieszyn (died 1356)
Bolesław of Cieszyn (– Prague, 23 July 1356), was a Polish prince, member of the Piast dynasty in the Cieszyn branch.
He was the second son of Casimir I, Duke of Cieszyn, by his wife Euphemia, daughter of Duke Trojden
I of Czersk-Warsaw.
Wenceslaus I, Duke of Cieszyn
Wenceslaus I of Cieszyn( 1413/18 – 1474), was a Duke of Cieszyn from 1431( until 1442 with his brothers as co-rulers), Duke of half of Bytom during 1431- 1452( returned to him soon after until 1459) and Duke of Siewierz( until 1443).
He was the oldest son of Duke Bolesław I of Cieszyn by his second wife Euphemia, daughter of Duke Siemowit IV of Masovia.
Bolesław I, Duke of Cieszyn
Bolesław I of Cieszyn( – 6 May 1431) was a Duke of half of Bytom and Siewierz from 1405, Duke of Cieszyn and half of both Głogów and Ścinawa from 1410, and Duke of Toszek and Strzelin during 1410 – 1414.
He was the second son of Przemysław I Noszak, Duke of Cieszyn by his wife Elisabeth, daughter of Bolesław, Duke of Koźle- Bytom.
In the chronicle of Jan Długosz he is named the eldest son, but this is certainly a mistake, because elsewhere, Przemysław of Oświęcim was always placed before Bolesław.
Frederick William, Duke of Cieszyn
Frederick William of Cieszyn (9 November 1601 – 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.
Casimir I, Duke of Cieszyn
Casimir I of Cieszyn (1280/90 –), 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 Grzymisława.
Władysław of Głogów
Władysław of Głogów( – 14 February 1460) was a Silesian nobleman.
He was the ruling Duke of Cieszyn during 1431 – 1442( with his brothers as co-rulers) and from 1442 sole ruler over half of both Głogów and Ścinawa.
He was the second son of Duke Bolesław I of Cieszyn by his second wife Euphemia, daughter of Duke Siemowit IV of Masovia.
Bolesław II, Duke of Cieszyn
Bolesław II of Cieszyn( c. 1425/28 – 4 October 1452), was a Duke of Cieszyn since 1431( until 1442 with his brothers as co-rulers), ruler over half of Bielsko and Frysztat( from 1442), and during 1452 sole ruler over one half of Bytom.
He was the fourth and youngest son of Duke Bolesław I of Cieszyn by his second wife Euphemia, daughter of Duke Siemowit IV of Masovia.
Wenceslaus III Adam, Duke of Cieszyn
Wenceslaus III Adam of Cieszyn (December 1524 – 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.

Question: Who is Bolesław Of Cieszyn (Died 1356)'s paternal grandfather?
Answer: Mieszko I, Duke of Cieszyn