Lady Augusta De Ameland (bornMurray; 27 January 1761[1] – 4 March 1830) was a Scottish aristocrat and the first wife of Prince Augustus Frederick, Duke of Sussex, the sixth son of George III. They married on 4 April 1793 in Rome. Their union was in contravention of the Royal Marriages Act 1772 because the Prince had not asked his father's permission, so she was not legally recognised as his wife.
Lady Augusta secretly married Prince Augustus Frederick, sixth son of King George III, on 4 April 1793 in a Church of England ceremony in her lodgings at Hotel Sarmiento, Rome.[2] They were married again on 5 December 1793 in St George's, Hanover Square, London, using their correct names but without revealing their full identities. Both marriage ceremonies were outside the terms of the Royal Marriages Act 1772 and were annulled in July 1794. Therefore, when the prince was ennobled as Duke of Sussex in 1801, she could not use the title Duchess of Sussex.
She was granted a pension of £4,000 per annum and bought a house in Ramsgate where she created a small estate. Augusta died on 4 March 1830 and is buried in the D'Este mausoleum in the churchyard at St Laurence-in-Thanet in Ramsgate.[5]