Note 11 — Chapter III · Fairy Ways and Words (continued 2)
Reading edition
As it stands now this would be unmutated Césel Gýfarch, ‘Cyfarch’s Nook,’ but there never was such a name. There was, however, Elgýfarch or Aelgýfarch and Rhygýfarch, and in such a combination as Césel Elgýfarch there would be every temptation to drop one unaccented el. ↑