John (Beaufort), Earl of Somerset, Marquess of Dorset

circa 1372 - 1410  (38 years)

• Name	John (Beaufort)  [1]
  Suffix	Earl of Somerset, Marquess of Dorset
  Birth	circa 1372  [1]
  Gender	Male
  Hereditary Title	1st Earl of Somerset  [1]
  Hereditary Title	1st Marquess of Dorset  [1]
  Occupation	Lord High Admiral  [1]
  Death	16 March 1410  [1]
  Person ID	I485	British Peerage & Gentry
  Last Modified	7 July 2018

  
  

  Father	John (Plantagenet), of Gaunt, 1st Duke of Lancaster,   b. March 1340, St. Bavo's Abbey, Ghent, Belgium d. 3 Feb. 1398/99, Leicester Castle, Leicester, Leicestershire, England (Age 58 years)
  Mother	Katharine de Roet   d. 10 May 1403, Lincoln, Lincolnshire, England
  Marriage	13 Jan. 1396/97	Lincoln Cathedral, Lincoln, Lincolnshire, England   [1, 2]
  Notes	The Beaufort children were legitimated by papal bull in September 1396 and by royal patent the following February. [2]
  Family ID	F248	Group Sheet  |  Family Chart

  
  

  Family	Lady Margaret Holand   d. circa 30 Dec. 1439
  Marriage	circa 1399  [1]
  Children	1. Henry (Beaufort), 2nd Earl of Somerset,   b. 25 Nov. 1400   d. 25 Nov. 1418 (Age 18 years) + 2. John (Beaufort), Duke of Somerset, Earl of Kendal, 3rd Earl of Somerset,   b. 25 March 1404   d. 27 May 1444 (Age 40 years)   3. Thomas (Beaufort), Earl of Perche,   b. 1405   d. 1432 (Age 27 years) + 4. Edmund (Beaufort), 1st Duke of Somerset,   b. 1406   d. 22 May 1455, St. Albans, Hertfordshire, England (Age 49 years)
  Family ID	F251	Group Sheet  |  Family Chart
  Last Modified	6 July 2018

  
  

• Heraldry		Arms of Beaufort (Ancient) (Earl of Somerset, Marquess of Dorset)
  		Arms of Beaufort (Modern) (Duke of Beaufort, formerly of Somerset)

  
  

• Sources

  [S8] Peter Townend (ed.), BP 1970, (London: Burke's Peerage Ltd., 1970), page liii. [S9] H. C. G. Matthew (ed.), Oxford D.N.B., (Oxford: Oxford University Press, 2004), Simon Walker, "Katherine [née Katherine Roelt; married name Katherine Swynford], duchess of Lancaster (1350?–1403), mistress and third wife of John of Gaunt, duke of Lancaster".