Princess Antonia of Prussia, Marchioness of Douro (b. April 28 1955) is a great-granddaughter of Wilhelm II of Germany and 355th in line to the British Throne. Antonia Elizabeth Brigid Louise Mansfeld was born in London in 1955, the daughter of Prince Frederick of Prussia and Lady Brigid Guinness. On February 3 1977, she married Arthur Wellesley (the son of the 8th Duke of Wellington) and took the courtesy title of Marchioness of Douro. They have five children:
- Arthur Gerald Wellesley, Earl of Mornington (b. 31 January 1978)
- Lady Honor Victoria Wellesley (b. 25 October 1979)
- Lady Mary Luise Wellesley (b. 16 December 1986)
- Lady Charlotte Anne Wellesley (b. 8 October 1990)
- Lord Frederick Charles Wellesley (b. 30 September 1992)
She is President of the Guinness Trust and a Trustee of the National Portrait Gallery.
| Preceded by Francis Achache |
Line of succession to the British Throne | Succeeded by Arthur Wellesley, Earl of Mornington |
