Note 16 — NOTES TO CANTO FIRST.
Reading edition
By some etymologists of that learned class, who not only know whence words come, but also whither they are going, the term Fairy, or Faërie, is derived from Faë, which is again derived from Nympha. It is more probable the term is of oriental origin, and is derived from the Persic, through the medium of the Arabic. In Persic, the term Peri expresses a species of imaginary being, which resembles the Fairy in some of its qualities, and is one of the fairest creatures of romantic fancy.
Minstrelsy of the Scottish Border, p. 115-116.