Favonius Look up Favonius at Dictionary.com
personification of the west wind in Roman mythology, OED says from Latin favere "to favor;" Klein says by dissimilation from *fovonius, literally "the warming wind," from fovere "to warm" (see fever). This is the source (via Old High German phonno, 10c., via Vulgar Latin contraction *faonius) of German Föhn "warm, dry wind blowing down Alpine valleys."