|Birth||January 17, 1800 (St. James's Square, City of Westminster, Greater London, England)|
|Death||January 20, 1865 (Seaham Hall)|
Frances Anne Vane, Marchioness of Londonderry (17 January 1800 – 20 January 1865) was a wealthy English heiress and noblewoman. She was the daughter of Sir Henry Vane-Tempest, 2nd Baronet and the second wife of Charles Vane, 3rd Marquess of Londonderry. Through her daughter, Lady Frances Vane, wife of John Churchill, 7th Duke of Marlborough, she was the great-grandmother of Sir Winston Churchill.
Frances Anne inherited extensive lands from her father in north east England. Her mother was Anne MacDonnell, 2nd Countess of Antrim. With her husband, she developed an extensive coal mining operation that included coal mines, a railroad, and docks at Seaham.
She became an object of affection for the Tsar Alexander I of Russia after he saw her portrait.
She sought to promote her eldest son's political career and was a patron of Benjamin Disraeli.
- George Henry Robert Charles William Vane-Tempest, 5th Marquess of Londonderry (1821–1884)
- Lady Frances Anne Emily Vane (1822–1899); married John Spencer-Churchill, 7th Duke of Marlborough.
- Lady Alexandrina Octavia Maria Vane (1823–1874), godchild of Alexander I of Russia; married Henry Dawson-Damer, 3rd Earl of Portarlington.
- Lord Adolphus Frederick Charles William Vane-Tempest (1825–1864), politician; became insane, and had to be medically restrained.
- Lady Adelaide Emelina Caroline Vane (c.1830–1882); disgraced the family by eloping with her brother's tutor, Rev. Frederick Henry Law.
- Lord Ernest McDonnell Vane-Tempest (1836–1885), fell in with a press-gang and had to be bought a commission in the army, from which he was subsequently cashiered.
Frederick William Robert Stewart, 4th Marquess of Londonderry (1805–1872) was her stepson.
Titles and styles
- 17 January 1800 - 3 April 1819 Lady Frances Anne Vane
- 3 April 1819 - 12 August 1822 The Right Honourable The Lady Stewart
- 12 August 1822 - 6 March 1854 The Most Honourable The Marchioness of Londonderry
- 2 March 1854 - 20 January 1865 The Most Honourable The Dowager Marchioness of Londonderry