Nielsen Hayden genealogy
Family: Thomas de Hoo / Isabel de St. Leger (F9503)
m. Bef 16 Jun 1335-
Male
Thomas de Hoo
Birth of Luton Hoo, Bedfordshire, England 
Death 28 Sep 1380 Burial Marriage Bef 16 Jun 1335 [1, 2] Father Robert de Hoo | F9506 Group Sheet Mother Hawise Fitzwarine | F9506 Group Sheet
Female
Isabel de St. Leger
Birth Abt 1319 Holcot, Northamptonshire, England Baptism Holcot, Northamptonshire, England Death 22 Jul 1393 Burial Father John de St. Leger | F9504 Group Sheet Mother Joan | F9504 Group Sheet
Male
William de Hoo
Birth of Maulden, Bedfordshire, England Death 22 Nov 1410 Burial Spouse Eleanor Wingfield | F9498 Marriage Spouse Alice de Saint Omer | F11496 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.
- [S1990] F. N. Craig, "Maternal Ancestry of Governor Thomas Dudley: Hoo, St. Omer, Malmains, St. Leger, Fitzwarin and Andevill Lines." The New England Historical and Genealogical Register 140:219, 1986., "bef 1336".
- [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.