William X, Duke of Aquitaine

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William X, Duke of Aquitaine, son of Guillaume IX, Duke of Aquitaine, Count of Poitou and Philippa of Toulouse, was born in 1099.1 He died at Santiago de Compostela, Spain, 9 April 1137.1,2

William married Eleanor de Chastellerault, daughter of Aimery I, Viscount of Chastellerault and Dangerose Bouchard, in 1121.1

For more information about William X, Duke of Aquitaine, please see this Wikipedia article.


Eleanor de Chastellerault d. aft. Mar 1130
This person was last edited on30 Mar 2021


  1. [S520] Frederick Lewis Weis, Walter Lee Sheppard Jr., William R. Beall and Kaleen E. Beall, Ancestral Roots of Certain American Colonists Who Came to America before 1700… ., 8th ed. (Baltimore: Genealogical Publishing Co., 2004), 110-25, further cited as Weis, Sheppard, Beall, and Beall, Ancestral Roots, 8th ed.
  2. [S1947] Douglas Richardson, Royal Ancestry: A Study in Colonial and Medieval Families (Five vols., Salt Lake City, Utah: s.p., 2013), 1:129 (Aquitaine 4), further cited as Richardson, Royal Ancestry.
  3. [S1947] Richardson, Royal Ancestry, 1:126 (Aquitaine 4).
  4. [S1947] Richardson, Royal Ancestry, 1:129 (Aquitaine 4.i).
  5. [S520] Weis, Sheppard, Beall, and Beall, Ancestral Roots, 8th ed., 110-26.