E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A hymn to Apollo, and applied to the god himself. We are told in Dr. Smiths Classical Dictionary, that this word is from Pæan, the physician of the Olympian gods; but surely it could be no honour to the Sun-god to be called by the name of his own vassal. Hermsterhuis suggests pauo, to make to cease, meaning to make diseases to cease; but why supply diseases rather than any other noun? The more likely derivation, me judice, is the Greek verb paio, to dart; Apollo being called the fardarter. The hymn began with Io Pan. Homer applies it to a triumphal song in general.