E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
So called from the nymph Minth, daughter of Cocytus, aud a favourite of Pluto. This nymph was metamorphosed by Plutos wife (Proserpine) out of jealousy, into the herb called after her name. The fable is quite obvious, and simply means that mint is a capital medicine. Minth was a favourite of Pluto, or death, that is, was sick and on the point of death; but was changed into the herb mint, or was cured thereby.