Elberethnoun. star queen/lady
êl (“star”) + bereth (“queen, spouse of a king”) No lenition: original name Elenbarathi yielding Elmbereth, where triconsonantal lmb > lb.
a tiro nin, fanuiloso guard me, Elbereth
elberethfeminine name. Queen of Stars, (lit.) Star-queen
The Sindarin name of Varda, a compound of êl “star” and bereth “queen”, that is: “Star-queen” (LotR/378, RGEO/66). The Quenya equivalent of this name is Elentári. This name was of ancient derivation, from ✶elen-barathī > elmbereth > Elbereth, as shown by the fact that the initial [b] in the second element did not lenite to [v] (MR/387, PE17/22).
Conceptual Development: In the earliest Lost Tales, this name was G. Timbridhil “Queen of Stars” (GL/71, LT1A/Tinwetári), which reappeared in The Etymologies from the 1930s as N. Timbreðil (Ety/TIN). Tolkien revised the name to N. Elbereth “Star Queen” (Ety/EL, Ety/BARATH), which appeared in the narratives starting with the Lord of the Rings drafts from the 1940s (RS/68).
Before giving this name to Varda, Tolkien used the name Ilk. Elbereth for the youngest child of Dior (Ety/BER), but he changed that name to Elrûn (later S. Elurín). Tolkien also used the name N. Elbereth for one of the sons of Elrond before renaming him S. Elrohir (WR/297).