John de Beaufort, 1st Marquess of Somerset and 1st Marquess of Dorset, later only 1st Earl of Somerset, KG b. 1371 Lincolnshire, England d. 16 March 1410 London, City of London, Greater London, England: Family History of Ivan Hurst

1371 - 1410 (39 years)

Personal Information | Sources | All

Name	John de Beaufort [2]
Suffix	1st Marquess of Somerset and 1st Marquess of Dorset, later only 1st Earl of Somerset, KG
Birth	1371	Lincolnshire, England [2]
Gender	Male
Death	16 March 1410	London, City of London, Greater London, England [2]
Burial	Canterbury, City of Canterbury, Kent, England [2]
Person ID	I320174102138	Hurst Improbable Family Tree
Last Modified	15 Jun 2026

Father	John Gaunt Plantagenet, b. 6 Mar 1340, St. Bavon Abbey, Ghent, Flanders d. 03 February 1399, Leicestershire, England (Age 58 years)
Mother	Constance of Castile, Duchess of Lancaster
Marriage	1372	Roquefort, Landes, Aquitaine, France
Family ID	F3399	Group Sheet \| Family Chart

Family Margaret Holland, Duchess Of Clarence, Lady Companions of the Garter, b. 1385 d. 31 Dec 1439 (Age 54 years)

Children

	1. Henry de Beaufort, 2nd Earl of Somerset, b. 26 Nov 1401 d. 25 Nov 1418 (Age 16 years)
	2. Joan Beaufort, Lady, Queen of Scots, b. Abt. 1404 d. 15 Jul 1445 (Age 41 years)
	3. John de Beaufort, 1st Duke of Somerset, 3rd Earl of Somerset, KG, b. 25 Mar 1404 d. 30 May 1444 (Age 40 years)
	4. Thomas de Beaufort, 1st Count of Perche, b. Abt. 1405 d. 3 Oct 1431 (Age 26 years)
	5. Edmund de Beaufort, 2nd Duke of Somerset, 4th Earl of Somerset, 1st Earl of Dorset, 1st Marquess of Dorset styled 1st Count of Mortain,KG, b. 1406 d. 22 May 1455 (Age 49 years)
	6. Margaret de Beaufort, Countess of Devon, b. Abt. 1409 d. 1449 (Age 40 years)

Family ID F510 Group Sheet | Family Chart

Last Modified 15 Jun 2026

[S_2080810673] Ancestry, (Online publication - Provo, UT, USA: Ancestry.com. Original data: Family Tree files submitted by Ancestry members.), Ancestry Family Tree.
[S_997064824] Ancestry.com, UK and Ireland, Find A Grave Index, 1300s-Current, (Ancestry.com Operations, Inc.).
[S1183224628] Ancestry.com, Geneanet Community Trees Index, (Ancestry.com Operations, Inc.).

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