Family: 1st Duke of Lancaster John of Gaunt Plantagenet / Katherine Swynford Roet (F739)
m. 13 Jan 1396
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Male
1st Duke of Lancaster John of Gaunt Plantagenet
Birth 24 Jun 1340 Gent, Oost-Vlaanderen, Belgium 
Death 4 Feb 1399 Leicestershire, England Burial 15 Mar 1398 London, London, England Marriage 13 Jan 1396 [1] Other Spouse Blanche of Lancaster | F1003 Marriage 1359 Other Spouse Constance de Castilla | F906 Marriage 21 Sep 1371 Bordeaux, Gironde, Aquitaine, France Father King of England Edward III of Windsor Plantagenet | F882 Group Sheet Mother Philippa d'Avesnes | F882 Group Sheet
Female
Katherine Swynford Roet
Birth 25 Nov 1350 Abbeville, Somme, Picardie, France Death 10 May 1403 Anjou, Isere, Rhone-Alpes, France Burial 1403 Lincoln, Lincolnshire, England Father Guilles Paon de Roet | F2454 Group Sheet Mother
Male
+ 1st Earl of Somerset John Beaufort
Birth 1373 Lincolnshire, England Death 16 Mar 1410 London, England Burial 1410 Canterbury, Kent, England Spouse Margaret Holland | F3345 Marriage Bef 28 Sep 1397 Upholland, Lancashire, England
Female
+ Lady Joan Beaufort
Birth 29 Jan 1375 Maine-et-Loire, Pays de la Loire, France Death 13 Nov 1440 Howden, Yorkshire, England Burial 1440 Lincoln, Lincolnshire, England Spouse Robert Ferrer | F3067 Marriage Bef 30 Sep 1390 Maine-et-Loire, Pays de la Loire, France Spouse 1st Earl of Westmoreland Ralph Neville | F740 Marriage Bef 29 Nov 1396 Maine-et-Loire, Pays de la Loire, France
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Sources - [S2174] Heritage Consulting, Millennium File, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2003;).
- [S2174] Heritage Consulting, Millennium File, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2003;).