Elizabeth Percy, Duchess of Northumberland (1716–1776)

Percy was the only daughter of Algernon Seymour, 7th Duke of Somerset, and his wife, Frances, daughter of Henry Thynne. Her grandparents were Charles Seymour, 6th Duke of Somerset and the great heiress Lady Elizabeth Percy.

On 29th July 1740, she married Sir Hugh Smithson, Bt, and they had two sons, Hugh (1742–1817) and Algernon (1750–1830). On her father's death in 1750, she inherited his barony of Percy and her husband acquired from her father his earldom of Northumberland by special remainder and changed his family name from Smithson to Percy that year. Sir Hugh's illegitimate son James Smithson, otherwise Jacques Louis Macie, born in about 1764 to one of Elizabeth's cousins, bequeathed the fortune which established the Smithsonian Institution.{{cite web|title=James Smithson|url=http://siarchives.si.edu/history/james-smithson|work=Smithsonian History|publisher=Smithsonian Institution Archives|access-date=6 May 2012}}

In 1761, Percy became a Lady of the Bedchamber to Queen Charlotte, a post she held until 1770. She became a duchess in 1766 when her husband was created Duke of Northumberland, and on her death in 1776, aged sixty, her barony and the earldom of Northumberland passed to her eldest son, Hugh, who inherited his father's dukedom ten years later. He built Brizlee Tower as one of a number of monuments to commemorate her.

Their children were:

• Lady Elizabeth Percy, who died unmarriedMosley, Charles, editor. Burke's Peerage, Baronetage & Knightage, 107th edition, 3 volumes. Wilmington, Delaware, U.S.A.: Burke's Peerage (Genealogical Books) Ltd, 2003. Page 2943
• General Hugh Percy, 2nd Duke of Northumberland (1742-1817)
• Algernon Percy, 1st Earl of Beverley (1750-1830)

Elizabeth Percy is buried in the Northumberland Vault, within Westminster Abbey. Her epitaph describes her as having "every amiable & benevolent virtue", and as "an ornament of courts, an honour to her country, & patern to the great, a protectress of the poor, ever distinguished for the most tender affection for her family & friends". The monument was erected by her husband, who is described as "inconsolable".{{cite web|url=http://www.westminster-abbey.org/our-history/people/elizabeth,-duchess-of-northumberland|title=Elizabeth, Duchess of Northumberland buried at Westminster Abbey|website=Westminster Abbey|access-date=24 March 2014|archive-url=https://web.archive.org/web/20160304064757/http://www.westminster-abbey.org/our-history/people/elizabeth,-duchess-of-northumberland|archive-date=4 March 2016|url-status=dead}}

In 1775, her diary of her travels in the Dutch Republic, called "A Short Tour made in the Year One Thousand Seven Hundred and Seventy One" was published, although anonymously.{{Cite web | url=https://books.google.com/books?id=5cVCAAAAYAAJ&q=a+short+tour+made+in+the+year&pg=PP7 | title=A Short Tour Made in the Year One Thousand Seven Hundred and Seventy One| year=1775}} Extracts from her lively, entertaining and historically informative diary were published in 1936.The Diaries of a Duchess, ed. James Greig, London 1936

The National Portrait Gallery holds several mezzotints based on portraits of the duchess by Sir Joshua Reynolds.{{cite web|url=https://www.npg.org.uk/collections/search/person/mp51632/elizabeth-percy-nee-seymour-duchess-of-northumberland|title=Elizabeth Percy (née Seymour), Duchess of Northumberland (1716-1776), Courtier and diarist|website=National Portrait Gallery|access-date=30 January 2018}} A watercolour portrait by Richard Gibson is held by the Fitzwilliam Museum, Cambridge.{{cite web|url=http://www.fitzwilliamprints.com/image/803766/gibson-richard-dwarf-gibson-elizabeth-percy-duchess-of-northumberland-by-richard-gibson|title=Elizabeth Percy, Duchess of Northumberland by Richard Gibson|website=Fitzwilliam Museum|access-date=30 January 2018|archive-date=31 January 2018|archive-url=https://web.archive.org/web/20180131023947/http://www.fitzwilliamprints.com/image/803766/gibson-richard-dwarf-gibson-elizabeth-percy-duchess-of-northumberland-by-richard-gibson|url-status=dead}}

Horace Walpole wrote,

{{Block indent|1="The Countess of Northumberland was a jovial heap of contradictions. The blood of all the Percies and Seymours swelled in her veins and in her fancy; while her person was more vulgar than anything but her conversation, which was larded indiscriminately with stories of her ancestors and her footmen. Show, and crowds, and junketting, were her endless pursuits. She was familiar with the mob, while stifled with diamonds; and yet was attentive to the most minute privileges of her rank, while almost shaking hands with a cobbler. Nothing was more mean than her assiduity about the King and Queen, whom she termed her Master and Mistress; and yet, though indirectly reprimanded by the latter, she persisted in following her Majesty to the theatres with a longer retinue of domestics than waited on the Queen herself. She had revived the drummers and pipers and obsolete minstrels of her family; and her own buxom countenance at the tail of such a procession, gave it all the air of an antiquated pageant or mumming. She was mischievous under the appearance of frankness; generous and friendly without delicacy or sentiment."{{cite book |last1=Walpole |first1=Horace |title=Memoirs of the Reign of George the Third |date=1845 |page=420 |edition=Volume 1 (of 4) |url=https://www.gutenberg.org/ebooks/57043 |access-date=21 June 2023}}}}

{{ahnentafel|Elizabeth Seymour, Duchess of Northumberland|2. Algernon Seymour, 7th Duke of Somerset|3. Frances Thynne|4. Charles Seymour, 6th Duke of Somerset|5. Lady Elizabeth Percy|6. Henry Thynne|7. Grace Strode|8. Charles Seymour, 2nd Baron Seymour of Trowbridge|9. Hon. Elizabeth Alington|10. Josceline Percy, 11th Earl of Northumberland|11. Lady Elizabeth Wriothesley|12. Thomas Thynne, 1st Viscount Weymouth|13. Lady Frances Finch|14. Sir George Strode|15. Grace FitzJames|16. Francis Seymour, 1st Baron Seymour of Trowbridge|17. Frances Prinne |18. William Alington, 1st Baron Alington|19. Elizabeth Tollemache|20. Algernon Percy, 10th Earl of Northumberland|21. Lady Elizabeth Howard|22. Thomas Wriothesley, 4th Earl of Southampton|23. Lady Elizabeth Leigh|24. Sir Henry Frederick Thynne|25. Hon. Mary Coventry|26. Heneage Finch, 3rd Earl of Winchilsea|27. Lady Mary Seymour|title=Ancestors of Elizabeth Percy, Duchess of Northumberland|collapsed=yes|align=center|boxstyle_1=background-color: #fcc;|boxstyle_2=background-color: #fb9;|boxstyle_3=background-color: #ffc;|boxstyle_4=background-color: #bfc;|boxstyle_5=background-color: #9fe;}}

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Percy, Elizabeth Percy, 2nd Baroness

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