Note 400 — Chapter XII · SUPERNATURAL ELEMENTS IN THE HOMERIC POEMS.
Reading edition
As seen (e.g.) in the application of the name Κωκυτός to a tributary of the Acheron. The presumption is that this name was originally a creation of poetic fancy, just as much as Πυριφλεγέθων. The diffusion of the names Acheron and Acherusia in other regions (Italy, the Black Sea, etc.) is doubtless due to the influence of poetry or tradition.