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.
Archduke Joseph, Palatine of Hungary Joseph Anton Johann, Archduke of Austria (German: "Erzherzog Joseph Anton Johann Baptist von Österreich-Toscana, a.k.a. Joseph Anton Johann von Österreich" , Hungarian: "Habsburg-Toscanai József Antal János főherceg, a.k.a. József nádor" , Czech: "Josef Habsbursko-Lotrinský" , 9 March 1776, Florence – 13 January 1847, Buda), was the Palatine of Hungary from 1796 to 1847. He was the seventh son of Leopold II, Holy Roman Emperor and Maria Luisa of Spain.