Nielsen Hayden genealogy
Family: Hervey de Stafford / Petronille de Ferrers (F1707)
m. Bef 1215-
Male
Hervey de Stafford
Birth of Stafford, Staffordshire, England 
Death Bef 12 May 1237 Burial Stone, Staffordshire, England Marriage Bef 1215 [1, 2] Father Hervey Bagot | F364 Group Sheet Mother Millicent de Stafford | F364 Group Sheet
Female
Petronille de Ferrers
Birth Death Aft 12 May 1237 Burial Stone, Staffordshire, England Father William de Ferrers | F4973 Group Sheet Mother (Unknown wife of William de Ferrers) | F4973 Group Sheet
Male
+ Robert de Stafford
Birth of Stafford, Staffordshire, England Death Bef 4 Jun 1261 Burial Spouse Alice Corbet | F3180 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.
- [S1016] Medieval English Ancestors of Robert Abell by Carl Boyer III. Santa Clarita, California, 2001.
- [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.