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.
Catherine of France, Countess of Montpensier Catherine of France (4 February 1378 – November 1388) was the youngest child of Charles V of France and Joanna of Bourbon, who were cousins. She was a sibling of Charles VI of France and Louis of Valois, Duke of Orléans.