Nielsen Hayden genealogy
Family: William le Vavasour / Nichole (F13272)
m. Bef 1280-
Male
William le Vavasour
Birth Death Bef 22 Mar 1313 Burial Hazlewood, Yorkshire, England 
Marriage Bef 1280 [1] Father John le Vavasour | F13273 Group Sheet Mother Alice de Cockfield | F13273 Group Sheet
Male
+ Henry le Vavasour
Birth Abt 1290 Death 1 Dec 1342 Louth Park Abbey, Lincolnshire, England Burial Louth Park Abbey, Lincolnshire, England Spouse Constance | F13271 Marriage
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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.