Albert I, Duke of Münsterberg-Oels
Albert I of Münsterberg- Oels( or; or; 3 August 1468, Kunětická Hora Castle – 12 July 1511, Prostějov) was a member of the House of Poděbrady and a Duke of the Silesian duchies of Münsterberg and Oleśnica and Count of Kladsko.
Henry II, Duke of Münsterberg-Oels
Henry II of Münsterberg-Oels (also known as:"Henry II of Poděbrady", or , ; 29 March 1507 – 2 August 1548, Bierutów) was from 1536 to 1542 Duke of Münsterberg and of Oels ("Oleśnica") and from 1542 to 1548 Duke of Bernstadt ("Bierutów").
He also held the title of Count of Glatz ("Kladsko"), though he never actually ruled the County itself.
Anna of Sagan
Anna of Sagan (Polish: "Anna żagańska",
Czech: "Anna Zaháňská", also "Hlohovsko-Zaháňská" or "Zaháňsko-Hlohovská")
(b. ca.
1480, d. 27 or 28 October 1541) was the last surviving member of the Głogów-Żagań branch of the Silesian Piasts family, and by marriage duchess of Münsterberg and Oels.
She was the daughter of Prince Jan II the Mad.
On 7 January 1488 she married Duke Charles I of Münsterberg-Oels, with whom she had twelve children:
She died on 27 or 28 October 1541 and was buried alongside her husband in the parish church of St. Anna in Frankenstein.
Joachim of Münsterberg-Oels
Joachim of Münsterberg( or" Joachim of Münsterberg- Oels"), also: Joachim of Poděbrady( German:" Joachim von Podiebrad"; Czech:" Jáchym z Poděbrad")( 18 January 1503 – 27 December 1562), a member of the Podiebrad family, was Silesian duke of Münsterberg and Oels from 1536 to 1542.
He also held the title of a Count of Kladsko( Kłodzko), though he never actually ruled the county.
From 1545 to 1560 he was Prince- Bishop of Brandenburg.
Karl Friedrich I, Duke of Münsterberg-Oels
Karl Friedrich I of Münsterberg-Oels (also: Karl Friedrich I of Poděbrady; or ; ; 18 October 1593, Oleśnica – 31 May 1647, Oleśnica) was Duke of Oels from 1617 to 1647 and Duke of Bernstadt from 1639 to 1647.
He also held the titles of Duke of Münsterberg and Count of Glatz.
Hedwig of Münsterberg-Oels
Hedwig of Munsterberg-Oels (10/12 June 1508, Oleśnica – 28 November 1531, Legnica) was born Duchess of Münsterberg and Oleśnica and Countess of Kladsko and by marriage Margravine of Brandenburg-Ansbach-Kulmbach.
Hedwig was a daughter of Duke Charles I of Münsterberg-Oels, who was a grandson of the King George of Bohemia.
Her mother was Anna of Sagan, a daughter of John II, the last Duke of Żagań (Sagan).
On 9 January 1525 Hedwig married Margrave George of Brandenburg-Ansbach-Kulmbach.
She was George's second wife.
The marriage produced two daughters:
Hedwig died in Legnica (Liegnitz), where she was buried.
Henry II, Duke of Münsterberg
Henry II of Münsterberg( – 11 March 1420) was Duke of Münsterberg( Ziębice) since 1410 until his death( as co-ruler of his brother John I).
He was the third son of Duke Bolko III of Münsterberg by his wife Euphemia, daughter of Duke Bolesław of Bytom.
Henry III, Duke of Münsterberg-Oels
Henry III of Münsterberg- Oels( also:" Henry III of Poděbrady Henry III of Bernstadt";;; 29 April 1542, Oleśnica – 10 April 1587, Oleśnica) was Duke of Münsterberg from 1565 to 1574 and Duke of Bernstadt.
He also held the title of Count of Glatz.
Bolko III of Münsterberg
Bolko III of Münsterberg( – 13 June 1410) was a Duke of Münsterberg( Ziębice) from 1358 until his death, and ruler over Gleiwitz( Gliwice) during 1369 – 1373.
He was the eldest son of Nicholas the Small, Duke of Münsterberg, by his wife Agnes, daughter of Herman Krušina of Lichtenberg.
George II, Duke of Münsterberg-Oels
George II of Münsterberg- Oels( also:" George II of Poděbrady";,; 30 April 1512 in Oleśnica – 13 January 1553 in Oleśnica) was a Duke of Münsterberg 1536- 1542 and Duke of Oels.
He also held the title of a Count of Glatz.

Question: Who is Hedwig Of Münsterberg-Oels's maternal grandfather?
Answer: Jan II the Mad