It is another name of Galadriel (in the Lord of the Rings) and it means lady of light. Now there will probably be lots of little Galadriels running around because of the movies, but Alatariel means the same thing and it is less common.

Galadriel was also known as Artanis and Nerwen. Alatariel is more like a title; it means 'maiden crowned with a garland of radiance' in the Elven language of J.R.R. Tolkien's Lord of the Rings series, in reference to Galadriel's golden hair.
See Also: Galadriel

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