[3] She was born 2 February 1426, and was acclaimed by the Cortes in Pamplona, 9 August 1427, as the legitimate heir of Charles of Viana (Charles "IV") and Blanche II of Navarre in succession to their mother.

In 1455, her father deposed her brother and her sister as heirs of Navarre and proclaimed Eleanor as the heir and the regent and general governor of Navarre.

In 1462, she signed the Treaty of Olite, in which she recognized her father as the monarch of Navarre and accepted to have her sister Blanche imprisoned under her care.

In 1468, her father killed her advisor Nicolas de Etchabarri, and deposed her as governor.

In 1441, she married Gaston IV, Count of Foix, and had the following children with him:[1]