Duke Wilhelm in Bavaria
Duke Wilhelm in Bavaria, full German name: "Wilhelm, Herzog in Bayern"
(born 10 November 1752 in Gelnhausen, Palatinate-Birkenfeld-Gelnhausen; died 8 January 1837 in Landshut or Bamberg, Kingdom of Bavaria) was Count Palatine of Birkenfeld-Gelnhausen between 1789 and 1799 and first Duke in Bavaria from 16 February 1799 until his death in 1837.
From 17 December 1803 to 20 March 1806, Wilhelm was titled Duke of Berg.
Wilhelm was a great-grandfather of Empress Elisabeth of Austria through his son Duke Pius August in Bavaria.
Countess Palatine Christiane Henriette of Zweibrücken-Birkenfeld
Christiane Henriette of Palatinate- Zweibrücken- Birkenfeld( 16 November 1725, Ribeauvillé – 11 February 1816, Arolsen) was a Countess of Palatine of Zweibrücken- Birkenfeld by birth and by marriage a Princess of Waldeck- Pyrmont.
Countess Palatine Magdalene Catherine of Zweibrücken
Magdalena Catherine, Countess Palatine of Zweibrücken( 26 April 1607, Zweibrücken – 20 January 1648, Strasbourg) was a Countess Palatine of Zweibrücken by birth and by marriage Duchess and Countess Palatine of Birkenfeld.
Countess Palatine Maria Anna of Zweibrücken-Birkenfeld
Countess Palatine Maria Anna of Zweibrücken-Birkenfeld-Bischweiler (18 July 1753 – 4 February 1824) was Countess Palatine of Birkenfeld-Gelnhausen and Duchess in Bavaria, through her marriage to Duke Wilhelm in Bavaria.
Maria Anna was a great-grandmother of Empress Elisabeth of Austria through his son Duke Pius August in Bavaria
Christian IV, Count Palatine of Zweibrücken
Christian IV, Count Palatine of Zweibrücken-Birkenfeld (6 September 1722 in Bischweiler – 5 November 1775 in Herschweiler-Pettersheim) was Duke of Zweibrücken from 1735 to 1775.
Countess Palatine Dorothea Catherine of Birkenfeld-Bischweiler
Countess Palatine Dorothea Catherine of Birkenfeld-Bischweiler (3 July 1634 – 7 December 1715) was a Countess Palatine of Zweibrücken-Birkenfeld-Bischweiler by birth and, by marriage, Countess of Nassau-Ottweiler.
Charles I, Count Palatine of Zweibrücken-Birkenfeld
Charles I of Zweibrücken-Birkenfeld (4 September 1560 – 16 December 1600), Count Palatine of the Rhine, Duke in Bavaria, Count to Veldenz and Sponheim was the Duke of Zweibrücken-Birkenfeld from 1569 until 1600.
Countess Palatine Barbara of Zweibrücken-Neuburg
Countess Palatine Barbara of Zweibrücken-Neuburg (27 July 1559 – 5 March 1618) was a Countess Palatine of Zweibrücken by birth and by marriage Countess of Oettingen-Oettingen.
Christian III, Count Palatine of Zweibrücken
Christian III, Count Palatine of Zweibrücken-Birkenfeld (Strassburg, 7 November 1674 – Zweibrücken, 3 February 1735) was a German nobleman.
He was a member of the House of Palatinate-Zweibrücken-Birkenfeld, a cadet branch of the House of Wittelsbach.
He was the son of Christian II of Zweibrücken-Birkenfeld and Katharina Agathe, Countess of Rappoltstein.
He was Count Palatine of Zweibrücken-Birkenfeld from 1717 to 1731.
In 1731, he inherited the sovereign duchy of Palatinate-Zweibrücken and thus became Count Palatine and Duke of Zweibrücken.
He was also Count of Rappoltstein from 1699 until his death.
Countess Palatine Maria Franziska of Sulzbach
Countess Palatine Maria Francisca of Sulzbach ("Maria Franziska, Pfalzgräfin von Sulzbach"; 15 June 1724 – 15 November 1794), was a Countess Palatine of Zweibrücken-Birkenfeld by marriage to Frederick Michael, Count Palatine of Zweibrücken-Birkenfeld.
Born in Schwetzingen, she was the fifth child of Joseph Karl, Count Palatine of Sulzbach and Countess Palatine Elizabeth Auguste Sophie of Neuburg.
From her six siblings, only she and two older sisters survive adulthood: Elisabeth Auguste and Maria Anna.

Question: What nationality is Countess Palatine Maria Anna Of Zweibrücken-Birkenfeld's husband?
Answer: German