Margaret Beaufort, Countess of Stafford (c. 1427–1474), the daughter of Edmund Beaufort, 1st Duke of Somerset (second creation) and the mother of Henry Stafford, 2nd Duke of Buckingham.
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Margaret Beaufort, Countess of Devon (c. 1409–1449), the daughter of John Beaufort, 1st Earl of Somerset, the mother of both Thomas Courtenay, 14th Earl of Devon and John Courtenay, 15th Earl of Devon.
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Margaret Beaufort, Countess of Richmond and Derby (1443–1509), the daughter of John Beaufort, 1st Duke of Somerset (first creation) and the mother of Henry VII of England.
Margaret Beaufort was the daughter of John Beaufort, 1st Earl of Somerset (c.1371 – 16 March 1410), by Margaret Holland (c.1385/6 – c.1439/40), the daughter of Thomas Holland, 2nd Earl of Kent, and Alice Arundel.
Lady Margaret Hall, Oxford, the first women's college in Oxford, named from Lady Margaret Beaufort.
Margaret Beaufort, Countess of Richmond and Derby (1443–1509), married name Margaret Stanley, mother of Henry VII of England
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In June 2013, she played Margaret Beaufort, mother of Henry VII, in the BBC series The White Queen, based on Philippa Gregory's bestselling historical novel series The Cousins' War.
Blizzard was recently seen performing in the BBC drama The White Queen (TV series) as a lady in waiting to Lady Margaret Beaufort played by Amanda Hale.