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 Christine Louise of Oettingen-Oettingen Christine Louise of Oettingen-Oettingen (20 March 1671 in Oettingen – 3 September 1747 in Blankenberg) was Duchess of Brunswick-Lüneburg. She was the maternal grandmother of Holy Roman Empress Maria Theresa, Queen Elisabeth Christine of Prussia, Queen Juliane Marie of Denmark and Norway and Tsar Peter II of Russia; the maternal great-grandmother of Queen Marie Antoinette of France, Tsar Ivan VI of Russia and Francis, Duke of Saxe-Coburg-Saalfeld; the maternal great-great-grandmother of King Leopold I of Belgium and the maternal great-great-great-grandmother of Queen Victoria of the United Kingdom.