Nielsen Hayden genealogy
Family: John of Gaunt / Catherine de Roet (F396)
m. Jan 1396-
Father | Male
John of Gaunt
Born Mar 1340 Ghent, Flanders 
Died 3 Feb 1399 Leicester Castle, Leicester, Leicestershire, England Buried St. Paul's Cathedral, London, England Married Jan 1396 [1] Lincoln Cathedral, Lincoln, Lincolnshire, England [1] Other Spouse Blanche of Lancaster | F9684 Married 19 May 1359 Reading Abbey, Berkshire, England Father Edward III, King of England | F1307 Group Sheet Mother Philippa of Hainault, Queen Consort of England | F1307 Group Sheet
Mother | Female
Catherine de Roet
Born Abt 1350 Died 10 May 1403 Lincoln, Lincolnshire, England Buried Lincoln, Lincolnshire, England Other Spouse Hugh Swynford | F3257 Married Abt 1366 St. Clement Danes, Westminster, Middlesex, England Father Payne de Roet | F1885 Group Sheet Mother
Child 1 | Male
+ John Beaufort
Born Abt 1371 Died 14 Mar 1410 London, England Buried Spouse Margaret Holand | F10044 Married
Child 2 | Female
+ Joan Beaufort
Born Abt 1379 Died 13 Nov 1440 Howden, Yorkshire, England Buried Lincoln Cathedral, Lincoln, Lincolnshire, England Spouse Robert Ferrers | F11054 Married Bef 30 Sep 1390 Spouse Ralph de Neville | F1868 Married Bef 29 Nov 1396
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Sources - [S1480] The Ancestry of Charles II, King of England: A Medieval Heritage by Charles M. Hansen and Neil D. Thompson. Saline, Michigan: McNaughton and Gunn, 2012.
- [S1480] The Ancestry of Charles II, King of England: A Medieval Heritage by Charles M. Hansen and Neil D. Thompson. Saline, Michigan: McNaughton and Gunn, 2012.