Who married Charles II August, Duke of Zweibrücken?

Charles II August Christian (German: Karl II. August Christian; 29 October 1746 – 1 April 1795) was Duke of Zweibrücken from 1775 to 1795. A member of the Palatine House of Zweibrücken-Birkenfeld, a branch of the House of Wittelsbach, he was the elder brother of the first King of Bavaria, Maximilian I, and of Queen Amalia of Saxony.

Maria Amalia of Saxony (26 September 1757 – 20 April 1831) was a Duchess consort of Zweibrücken by her 1774 marriage to Charles II August, Duke of Zweibrücken.