Lord of Rivendell (LotR/170). His name is translated “Star-dome” (Let/448, WJ/414), a combination of êl “star” and rond “vaulted roof” (SA/rond, WJ/414).
Conceptual Development: The name Elrond first appeared in early Silmarillion drafts from the late 1920s (SM/38) and was first published in the Hobbit in 1937. His name appeared in the Etymologies from the 1930s in two forms: Noldorin Elrond “Starry-dome” (Ety/EL) and Ilkorin Elrond “Vault of Heaven” (Ety/ROD), both with essentially the same etymology as his later Sindarin name. In a few places Tolkien considered alternate etymologies for this name: in his notes on “Words, Phrases and Passages from The Lord of the Rings” from the 1950s-60s, he suggested the final element might be rhond “body” (PE17/183), and in a letter to Rhona Beare from 1958, he suggested the initial element might be archaic †Ell “Elf” (Let/281). Both of these seem to have been transient ideas.