Mademoiselle Dartois Sophie

French princess of the House of Bourbon, daughter of Charles Philippe de France, known as the comte d'Artois. Her mother was Princess Maria Theresa of Savoy, third daughter of Victor Amadeus III of Sardinia and Maria Antonietta of Spain. She was known as Mademoiselle – a very prestigious style of address which was given to the most senior unmarried princess at the court of Versailles. Sophie was also titled Mademoiselle d’Angoulême and Mademoiselle d'Artois – the former reflecting the Duke of Angoulême which was the title of her brother Louis Antoine d'Artois. Artois was derived from her father's Appanage of the County of Artois. Her father, as a son of the Dauphin of France, held the rank of Grandson of France. Louis XVI declared that his niece and her siblings would be regarded as Grandchildren of France despite not being born to a King or Dauphin of France. This rank of Grandchild, which immediately followed the Children of France allowed Sophie to the style of Royal Highness but she was always known as Mademoiselle. Sophie died on 5 December 1783 at the Palace of Versailles at the age of seven. Link to Wikipedia biography