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.
Élisabeth Charlotte d'Orléans Élisabeth Charlotte d'Orléans (13 September 1676 – 23 December 1744) was a French "petite-fille de France", and duchess of Lorraine and Bar by marriage to Leopold, Duke of Lorraine. She was regent of Lorraine and Bar during the minority (1729-30) and absence of her son 1730-37), and "suo jure" Princess of Commercy in 1737-44. Among her children was Francis I, Holy Roman Emperor, a co-founder of the House of Habsburg-Lorraine.