Nielsen Hayden genealogy
Ermengarde de Tonnerre
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Name Ermengarde de Tonnerre [1] Gender Female Death Bef 1090 [2] Person ID I2590 Ancestry of PNH, TNH, and others | Ancestor of AP, Ancestor of DDB, Ancestor of EK, Ancestor of GR, Ancestor of JMF, Ancestor of KL, Ancestor of LD, Ancestor of LDN, Ancestor of LMW, Ancestor of TNH, Ancestor of TSW, Ancestor of TWK Last Modified 6 Jan 2018
Father Renaud de Tonnerre Family ID F6241 Group Sheet | Family Chart
Family 
Guillaume I de Nevers, b. of Nevers, Nievre, Bourgogne, France
d. 20 Jun 1100Marriage Abt 1039 [3] Children + 1. Ermengarde de Nevers d. 14 Oct 1090 + 2. Renaud II de Nevers d. 5 Aug 1089 + 3. Guillaume de Nevers Family ID F3465 Group Sheet | Family Chart Last Modified 29 Jan 2017
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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.
- [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler.
- [S380] French-language Wikipedia.
- [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.