Question: The Duchess of Cornwall uses her title instead of what other title, the title held by the first wife of Prince Charles?
Related documents: [0]  [DOC] Princess of Wales (Welsh: "Tywysoges Cymru" ) is a British courtesy title held by the wife of the Prince of Wales, who is, since the 14th century, the heir apparent of the English or British monarch. The first acknowledged title holder was Eleanor de Montfort, wife of Llywelyn ap Gruffudd. It has subsequently been used by wives of post-conquest princes of Wales. [END] 
[1]  [DOC] Camilla, Duchess of Cornwall, ("née" Camilla Rosemary Shand, previously Parker Bowles; born 17 July 1947), is the second wife of Charles, Prince of Wales, the eldest child and heir apparent of Queen Elizabeth II. Instead of using the title of Princess of Wales, she uses the title Duchess of Cornwall, her husband's secondary designation. In Scotland, she is known as the Duchess of Rothesay. In the event of Charles acceding to the throne, Camilla would become a queen consort; however, an official statement issued by Clarence House on the day of her marriage to Charles announced that she would be known as the Princess Consort. [END] 
Answer: 
Princess of Wales
Princess of Wales