John Beaufort, 1st Earl of Somerset 1st Marquess of Somerset 1st Marquess of Dorset KG

Abt 1371 - 1410  (39 years)

• Name	John Beaufort
  Suffix	1st Earl of Somerset 1st Marquess of Somerset 1st Marquess of Dorset KG
  Birth	Abt 1371	Beaufort, Champagne, France
  Gender	Male
  mtDNA	J1c2c3
  Reference Number	11933
  Death	16 Mar 1410	London, England
  Person ID	I11933	KLD Genealogy
  Last Modified	26 Nov 2025

  
  

  Father	John of Gaunt, Duke of Lancaster Duke of Aquitaine,   b. 6 Mar 1340, Ghent, Flanders d. 3 Feb 1399, Leicester Castle, Leicestershire, England (Age 58 years)
  Relationship	biological
  Mother	Katherine de Roet, Duchess of Lancaster,   b. Abt 1350   d. 10 May 1403 (Age 53 years)
  Relationship	biological
  Marriage	1396
  	Former Mistress - Their children were legitimized by decree of Richard II, but not allowed to inherit the throne
  Family ID	F4321	Group Sheet  |  Family Chart

  
  

  Family	Margaret Holland,   b. 1385   d. 30 Dec 1439, Bermondsey Abbey, London, England (Age 54 years)
  Children	1. Joan Beaufort, Queen Consort of Scotland,   b. UNKNOWN, England d. 15 Jul 1445, Dunbar Castle, Dunbar, Haddingtonshire, Scotland  [Father: biological]  [Mother: biological]   2. Henry Beaufort, 2nd Earl of Somerset,   b. 1401   d. 1418 (Age 17 years)  [Father: biological]  [Mother: biological]   3. John Beaufort, 1st Duke of Somerset,   b. 1404   d. 1444 (Age 40 years)  [Father: biological]  [Mother: biological]   4. Thomas Beaufort, Count of Perche,   b. Abt 1405   d. 1431 (Age 26 years)  [Father: biological]  [Mother: biological]   5. Edmund Beaufort, 2nd Duke of Somerset KG,   b. Abt 1406   d. 1455 (Age 49 years)  [Father: biological]  [Mother: biological]   6. Margaret Beaufort, Countess of Devon,   b. Abt 1408   d. 1449 (Age 41 years)  [Father: biological]  [Mother: biological]
  Family ID	F4325	Group Sheet  |  Family Chart
  Last Modified	26 Nov 2025

  
  

• Event Map

  Birth - Abt 1371 - Beaufort, Champagne, France Death - 16 Mar 1410 - London, England  = Link to Google Earth