Nielsen Hayden genealogy
Family: Ralph de Mortimer / Gwladus Ddu (F3387)
m. Bef 26 Oct 1230-
Father | Male
Ralph de Mortimer
Born of Wigmore, Herefordshire, England 
Died 6 Aug 1246 Buried Wigmore Abbey, Herefordshire, England 
Married Bef 26 Oct 1230 [1, 2, 3, 4, 5] Father Roger de Mortimer | F2125 Group Sheet Mother Isabel de Ferrers | F2125 Group Sheet
Mother | Female
Gwladus Ddu
Born Died 1251 Windsor, Berkshire, England 
Buried Other Spouse Reynold de Briouze | F1970 Married 1215 Father Llywelyn Fawr ap Iorwerth | F2856 Group Sheet Mother Joan of England | F2856 Group Sheet
Child 1 | Male
+ Roger de Mortimer
Born of Wigmore, Herefordshire, England 
Died 27 Oct 1282 Kingsland, Herefordshire, England 
Buried Wigmore Abbey, Herefordshire, England 
Spouse Maud de Briouze | F1734 Married Bef 1248
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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.
- [S145] Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr. 8th edition, William R. Beall & Kaleen E. Beall, eds. Baltimore: Genealogical Publishing Company, 2004, 2006, 2008.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S1016] Medieval English Ancestors of Robert Abell by Carl Boyer III. Santa Clarita, California, 2001., year only.
- [S1526] The Ancestry of Dorothea Poyntz, Wife of Reverend John Owsley, Generations 1-15, Fourth Preliminary Edition, by Ronny O. Bodine and Bro. Thomas Spalding, Jr. 2013., year only.
- [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.