[11] She was baptised by Henry of Marcy and her godparents at her baptism were Achard, bishop of Avranches, and the abbot of Le Mont Saint Michel, Robert of Torigni.

[2] Her parents' purpose in arranging the marriage was to secure Aquitaine's Pyrenean border, while Alfonso sought an ally in his struggles with Sancho VI of Navarre.

Of all Eleanor of Aquitaine's daughters, her namesake was the only one who was enabled, by political circumstances, to wield the kind of influence her mother had exercised.

[11] She was almost as powerful as Alfonso, who specified in his will in 1204 that she was to rule alongside their son in the event of his death, including taking responsibility for paying his debts and executing his will.

In 1179, she took responsibility to support and maintain the shrine to St. Thomas Becket in the cathedral of Toledo,[18] which had been founded by Count Nuño Peréz de Lara and his wife Teresa Fernández in 1177.

In accordance with the will of her late spouse, Eleanor became regent of Castile during the minority of her son, in which her daughter acted as her advisor.

[21] Eleanor later became sick and died only twenty-six days after her husband, and was buried at Abbey of Santa María la Real de Las Huelgas.

[22] Eleanor was praised for her beauty and regal nature by the poet Ramón Vidal de Besalú after her death.