Miniel (pl. Mínil) (S. 'First elf') is the name Vanyar were called in Beleriand.
The word is composed of min = "first" and el = "elf"
J.R.R. Tolkien, Christopher Tolkien (ed.), The War of the Jewels, "Part Four. Quendi and Eldar", pgs. 363-364; 383.