John Beaufort, 1st Marquess of Somerset and 1st Marquess of Dorset, later only 1st Earl of Somerset, KG (1373 – 16 March 1410) was the first of the four illegitimate children of John of Gaunt, 1st Duke of Lancaster, and his mistress Katherine Swynford, later his wife. Beaufort was born in about 1371 and his surname probably reflects his father's lordship of Beaufort in Champagne, France.
Born |
1373
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Died |
16 March 1410 (aged 36)
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