Nielsen Hayden genealogy
Constance
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Name Constance [1] Gender Female Person ID I21543 Ancestry of PNH, TNH, and others | Ancestor of JTS Last Modified 22 Dec 2017
Family Henry le Vavasour, b. Abt 1290 d. 1 Dec 1342, Louth Park Abbey, Lincolnshire, England 
(Age ~ 52 years) Children + 1. Henry le Vavasour d. Bef 27 Nov 1349 Family ID F13271 Group Sheet | Family Chart Last Modified 22 Dec 2017
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Notes - Possibly a daughter of Sir William Mowbray. Complete Peerage references Misc. Gen. et Her., vol. i, p. 193.
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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.