What is the full name of the eldest sibling who performed for the Empress Maria Theresa at the Imperial Court during a visit to Vienna in 1762?
Maria Anna Mozart Maria Anna Walburga Ignatia Mozart (30 July 1751 – 29 October 1829), called Marianne and nicknamed "Nannerl", was a musician, the older sister of Wolfgang Amadeus Mozart and daughter of Leopold and Anna Maria Mozart.
Princess Augusta of Bavaria Princess Augusta of Bavaria, Duchess of Leuchtenberg (German: "Augusta Amalia Ludovika von Bayern" ) (Strasbourg, 21 June 1788 – Munich, 13 May 1851) was the second child and eldest daughter of Maximilian I Joseph of Bavaria and Augusta Wilhelmine of Hesse-Darmstadt.