Nielsen Hayden genealogy
Family: John du Plessis / Christian de Saunford (F70)
m. 1234-
Female
Christian de Saunford
Birth of Missenden, Buckinghamshire, England 
Death Bef 25 Dec 1242 Burial Father Hugh de Saunford | F761 Group Sheet Mother Joan Noers | F761 Group Sheet
Male
+ Hugh de Plessis
Birth Between 1237 and 1239 of Hook Norton, Oxfordshire, England Death Bef 7 Jul 1292 Burial Spouse Isabel Biset | F3618 Marriage Bef Oct 1249
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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.