Nielsen Hayden genealogy
Family: Aubrey de Vere / Agnes of Essex (F8171)
m. Between 1162 and 1163-
Male
Aubrey de Vere
Birth Abt 1110 of Hedingham, Essex, England 
Death 26 Dec 1194 Burial Earl's Colne Priory, Halstead, Great Bromley, Essex, England Marriage Between 1162 and 1163 [1, 2] Other Spouse Beatrice | F21952 Marriage Bef 1139 Father Aubrey de Vere | F5257 Group Sheet Mother Alice de Clare | F5257 Group Sheet
Female
Agnes of Essex
Birth Between 1151 and 1152 Death Aft 1205 Burial Earl's Colne Priory, Halstead, Great Bromley, Essex, England Father Henry of Essex | F8172 Group Sheet Mother Cecily de Valognes | F8172 Group Sheet
Male
Robert de Vere
Birth Aft 1164 of Hedingham, Essex, England Death Bef 25 Oct 1221 Burial Hatfield Regis Priory, Hatfield Broad Oak, Essex, England Spouse Isabel de Bolebec | F8169 Marriage
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Sources - [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013.
- [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.
- [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013.