Nielsen Hayden genealogy
Family: Henry de Beaumont / Alice Comyn (F9687)
m. Bef 14 Jul 1310-
Male
Henry de Beaumont
Birth Death 10 Mar 1340 Burial Marriage Bef 14 Jul 1310 [1] Father Louis de Brienne | F10127 Group Sheet Mother Agnes de Beaumont | F10127 Group Sheet
Female
Alice Comyn
Birth Death Bef 10 Aug 1349 Burial Father Alexander Comyn | F9686 Group Sheet Mother Joanna Latimer | F9686 Group Sheet
Female
+ Isabel de Beaumont
Birth Death Aft 24 Mar 1361 Burial Spouse Henry of Grosmont | F9683 Marriage Abt 1337
Male
+ John de Beaumont
Birth Abt 1318 Death 14 Apr 1342 Northampton, Northamptonshire, England 
Burial Spouse Eleanor of Lancaster | F23513 Marriage Bef Jun 1337
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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.
- [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.