Władysław of Oświęcim
Władysław of Oświęcim( 1275/80 – by 15 May 1324), was a Duke of Oświęcim from 1315 until his death.
He was the eldest 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.
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.
Mieszko I, Duke of Cieszyn
Mieszko I of Cieszyn( also known as Mieszko I of Opole; 1252/56 – by 27 June 1315), was a Duke of Racibórz during 1282– 1290( with his brother as co-ruler) and the first Duke of Cieszyn since 1290 until his death.
He was the oldest son of Władysław, Duke of Opole- Racibórz, by his wife Euphemia, daughter of Władysław Odonic, Duke of Greater Poland.
Ladislaus of Salzburg
Władysław of Salzburg, also known as Władysław of Wrocław or Władysław of Silesia( – 27 April 1270), a member of the Silesian Piasts, was co-ruler in the Duchy of Wroclaw since 1248.
He served as chancellor of King Ottokar II of Bohemia from 1255 and was elected Bishop of Bamberg in 1257 and Bishop of Passau in 1265.
Władysław became Prince- Archbishop of Salzburg in the same year, and from 1268 also served as administrator of the Wrocław diocese.
Władysław of Cieszyn (d. 1355)
Władysław of Cieszyn  (1325/31 – May 1355) was a Polish prince member of the Piast dynasty in the Cieszyn branch.
He was the eldest son of Casimir I, Duke of Cieszyn, by his wife Euphemia, daughter of Duke Trojden
I of Czersk-Warsaw.
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.
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.
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.
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.

Question: Who is Władysław Of Cieszyn (D. 1355)'s paternal grandfather?
Answer: Mieszko I, Duke of Cieszyn