John "Fairborn" Beaufort III, Knight of the Garter I Earl of Somerset
- Born: Abt 1373, Lincolnshire, England 1
- Marriage (1): Lady Margaret Holland Countess Albermarle and Somerset Duchess Clarence Marquesses Dorset on 28 Sep 1397 in Up Holland Castle, Upholland, Lancashire, England
- Died: 27 May 1444, Minster, Wimborne, Dorset, England about age 71
John married Lady Margaret Holland Countess Albermarle and Somerset Duchess Clarence Marquesses Dorset, daughter of Sir Thomas Holland II, Justice in Eyre Earl Kent Lord III Baron Holland and Alice FitzAlan, on 28 Sep 1397 in Up Holland Castle, Upholland, Lancashire, England. (Lady Margaret Holland Countess Albermarle and Somerset Duchess Clarence Marquesses Dorset was born on 30 Dec 1385 in Up Holland Castle, Upholland, Lancashire, England and died on 30 Dec 1439 in Bermondsey Abbey, London Borough of Southwark, South East, London, England.)
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