Rozyna Małgorzata von Eckenberg
Rozyna Małgorzata von Eckenberg( 1625- 1648), was a Polish court official.
She was the daughter of NN von Eckenberg and Margarethe von Toll.
She came to Poland as a lady- in- waiting to the new queen of Poland, Cecilia Renata of Austria, and was appointed governess to Sigismund Casimir.
Between the death of Cecilia and the next marriage of the king, she was mistress of Władysław IV Vasa from 1644 to 1646.
She married Michał Jerzy Czartoryski.
Archduchess Margaret of Austria (nun)
Margaret of Austria( 1536 – 1567) was an Archduchess of Austria.
Archduke Otto of Austria (1865–1906)
Archduke Otto Franz Joseph Karl Ludwig Maria of Austria (21 April 1865 – 1 November 1906) was the second son of Archduke Karl Ludwig of Austria (younger brother of Emperor Franz Joseph I of Austria) and his second wife, Princess Maria Annunciata of Bourbon-Two Sicilies.
He was the father of Charles I of Austria, the last Emperor of Austria.
Cecilia Renata of Austria
Archduchess Cecilia Renata of Austria (German: "Cäcilia Renata"; Polish: "Cecylia Renata"; 16 July 1611 – 24 March 1644) was Queen of Poland as the wife of King Władysław IV Vasa.
Ida of Formbach-Ratelnberg
Ida of Austria (1055 – September 1101) was a Margravine of Austria by marriage to Leopold II of Austria.
She was a crusader, participating in the Crusade of 1101 with her own army.
Maria Anna of Savoy
Maria Anna of Savoy( 19 September 1803 – 4 May 1884) was Empress of Austria and Queen of Hungary( see Grand title of the Empress of Austria) by marriage to Emperor Ferdinand I of Austria.
Sigismund Casimir
Sigismund Casimir, Crown Prince of Poland( 1 April 1640 – 9 August 1647), was a Polish prince and the only legitimate son of King Ladislaus IV and his first wife Queen Cecilia Renata.
He was named after his grandfather Sigismund III, and uncle John Casimir.
Archduchess Catherine Renata of Austria
Archduchess Catherine Renata of Austria (4 January 1576 – 29 June 1599) was a member of the House of Habsburg.
She was the daughter of Archduke Charles II of Austria, the son of Emperor Ferdinand I, and Maria Anna of Bavaria.
Her elder brother Archduke Ferdinand succeeded Matthias as Holy Roman Emperor in 1619.
Albert VI, Duke of Bavaria
Albert VI of Bavaria( 26 February 1584 – 5 July 1666) son of William V, Duke of Bavaria and Renata of Lorraine, born and died in Munich.
Władysław IV Vasa
Władysław IV Vasa or Ladislaus IV Vasa (9 June 1595 – 20 May 1648) was king of Poland, of the House of Vasa, who ruled from 1632 until his death in 1648.
Władysław IV was the son of Sigismund III Vasa (Polish: "Zygmunt III Waza") and his wife, Anna of Austria (also known as Anna of Habsburg).
Władysław was elected Tsar of Russia by the Seven Boyars in 1610 when the Polish army captured Moscow, but did not assume the throne due to his father's position and a popular uprising.
Nevertheless, until 1634 he used the title of Grand Duke of Muscovy.
Elected king of Poland in 1632, he was fairly successful in defending the Polish–Lithuanian Commonwealth against invasion, most notably in the Smolensk War of 1632–34, in which he participated personally.
He supported religious tolerance and carried out military reforms, such as the founding of the Commonwealth Navy.
He was also a renowned patron of the arts and music.
He failed, however, to realize his dreams of regaining the Swedish crown, gaining fame by defeating the Ottoman Empire, strengthening royal power, and reforming the Commonwealth.
He died without a legitimate male heir and was succeeded to the Polish throne by his half-brother, John II Casimir Vasa ("Jan Kazimierz Waza").
Władysław's death marked the end of relative stability in the Polish–Lithuanian Commonwealth, as conflicts and tensions that had been growing over several decades came to a head with devastating consequences, notably the largest of the Cossack uprisings – the Khmelnytsky Uprising (1648) – and the Swedish invasion ("the Deluge", 1655–60).

Question: What nationality is Cecilia Renata Of Austria's husband?
Answer: Polish–Lithuanian Commonwealth