Nielsen Hayden genealogy
Family: Hubert de Burgh / Isabel (F2042)
m. Sep 1217-
Father | Male
Hubert de Burgh
Born Abt 1170 Died 1243 Buried Black Friars, Holborn, London, England 
Married Sep 1217 [1] Other Spouse Beatrix de Warenne | F5207 Married Aft 1208 Other Spouse Margaret of Scotland | F749 Married Jun 1221 York, Yorkshire, England Father Walter de Burgh | F4312 Group Sheet Mother Alice | F4312 Group Sheet
Mother | Female
Isabel
Born Died 14 Oct 1217 Buried Other Spouse John, King of England | F121 Married 29 Aug 1189 Marlborough, Wiltshire, England Father William fitz Robert | F5507 Group Sheet Mother Hawise of Leicester | F5507 Group Sheet
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Sources - [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998., "[P]robably a few days before her death".
- [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998., "[P]robably a few days before her death".