Erir, Heremi, Heremus, Herir, Heriri, Reir
Eryri is deeply connected to the Welsh culture and history. The Welsh language is spoken in the area, and the region has a rich cultural heritage that includes traditions, myths, and legends.
The name by which Geoffrey refers to Yr Wyddfa Fawr or, more usually nowadays, Mount Snowdon.
According to Tennyson, it was rumored that the infant Arthur had been found by a forester on the mountain.
Historia Brittonum | Probably Nennius, early 9th century
Brut | Layamon, late 12th century to mid-13th century
Idylls of the King | Lord Alfred Tennyson, 1859-1886