elf

From Middle English elf, from Old English ielf, ælf, from Proto-West Germanic *albi, from Proto-Germanic *albiz. Ultimately probably derived from Proto-Indo-European *h₂elbʰós (“white”). Doublet of alf, awf, and oaf. The modern fantasy literature sense was popularised by the works of J.R.R. Tolkien.

出典: Wiktionary「elf」（CC BY-SA 4.0）