Nielsen Hayden genealogy
Louis de Brienne
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Name Louis de Brienne [1] Gender Male 
Siblings1 sibling Person ID I16516 Ancestry of PNH, TNH, and others | Ancestor of DGH Last Modified 1 Sep 2018
Father Jeane de Brienne, King of Jerusalem; Latin Emperor of Constantinople, b. Between 1169 and 1174, d. 23 Mar 1237, Constantinople 
(Age ~ 68 years) Mother Bérenguère of Castile-León, b. 1204, d. 12 Apr 1237, Constantinople (Age 33 years) Married 1223 Burgos, Castile, Spain [2] Family ID F10538 Group Sheet | Family Chart
Family Agnes de Beaumont Children + 1. Henry de Beaumont, d. 10 Mar 1340 Last Modified 1 Sep 2018 Family ID F10127 Group Sheet | Family Chart
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Notes - Jure uxoris viscount of Beaumont.
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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.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [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.