'Elbereth' was the Sindarin name of the Vala Varda. Her name appears many times in The Lord of the Rings, usually in a song or invocation.

In The Fellowship of the Ring, the Elves whom Frodo Baggins, Peregrin Took, and Samwise Gamgee meet in the Shire are singing a song in her praise. Frodo calls out to Elbereth when he is attacked at Weathertop, and Aragorn refers to her name as "deadly" to the Nazgûl. In The Return of the King, Frodo calls out to her when first using the Phial of Galadriel, in the caves of Shelob. Later, Sam suggests "Elbereth" as a password to Frodo after he frees Frodo from the orcs in the Tower of Cirith Ungol; for when Frodo must let down the ladder once returning from gathering gear for two to wear in Mordor.