Eleanor

Per Wikipedia, “Eleanor” is related to the Occitan phrase “alia Aenor”, translated to “the other Aenor”. “Aenor” may itself be a corruption of “Adamardis”, apparently a feminine form of “Ademar”. “Ademar” is a masculine Germanic name, ultimately derived from “Audamar”, from the elements aud “wealth, prosperity” and mar “fame”.

From Adenorde: 'adal' - noble or 'alda' - old, ancient, and 'nord' - North.
Or from Adamardis (f), Ademar(m): 'aud' - wealth, and 'meri' - famous.

I'm confused as to how "the other Aenor" can be the only explanation for Eleanor, as, contrary to what's stated, Eleanor of Aquitaine doesn't seem to have been the first bearer of the name. Éléonore de Blois-Champagne seems to have been at least 18 years older than Eleanor of Aquitaine, and her mother's name was Adela, not Aenor.

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https://www.geni.com/people/%C3%89l%C3%A9onore-de-Blois-Champagne/6000000005598859553. [noted -ed]

This name is commonly thought to mean "torch" or "shining light".

Elinor, Alanor, means god's light in Hebrew and Arabic, or possibly 'god is my light'.
eli- of god, noor/nur/nor - light/lamp

I thought the name Eleanor came from the name Helen, which means 'bright light' or 'shining one'?

I read that Eleanor comes from Greek origin and means "shining light."

Another theory on the origin of the name, in the context of Eleanor of Aquitaine, is that her name came from a corruption of the Old French ALIA - AENOR, meaning 'the daughter of Aenor'. [noted -ed]

Eleanor of Aquitaine's name (in the form Alienor) comes from the compound of her mother's name Aenor and the Latin(?) prefix 'alia' meaning 'other'. Essentially her name meant 'the other Aenor'.

Eleanor of Aquitaine was named such after her mother, Aenor. Her name breaks down as "alia-aenor," literally "the other Aenor."

Another version of this name is Elanor. This can be taken as a form of Eleanor, or by its Quenya meaning, 'sun-star'. In JRR Tolkien's novel 'The Lord of the Rings' Elanor is the name of both a golden five-pointed flower that grows in the woods of Lothlorien and of Samwise and Rose Gamgee's eldest daughter due to her blonde hair.

Elanor (el: star, and anor: sun) comes from Quenya, but that's just in Tolkien's books.