Nielsen Hayden genealogy
Family: William de Aton / Isabel Percy (F13231)
m. Bef Jan 1327-
Male
William de Aton
Birth Abt 1299 Death 10 Feb 1388 Burial Old Malton Priory, Yorkshire, England 
Marriage Bef Jan 1327 [1] Father Gilbert de Aton | F13244 Group Sheet Mother
Female
Isabel Percy
Birth Death Between 13 Sep 1349 and 25 May 1368 Burial Father Henry de Percy | F3344 Group Sheet Mother Idoine de Clifford | F3344 Group Sheet
Female
+ Elizabeth de Aton
Birth Death Between 25 Apr 1402 and 1 May 1402 Burial Spouse John Conyers | F13229 Marriage
Female
+ Anastasia de Aton
Birth Death Aft 22 Jul 1389 Burial Spouse Edward de St. John | F23244 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.