Styx was primarily a feature in the afterworld of Greek Mythology, but has been described as a feature present in the hell of christianity as well, notably in the [Divine Comedy]?.
Styx was also the name of a rock band popular in the midwest US in the late 70s early 80s, contemporaneous with other midwestern favorites such as Supertramp?, REO Speedwagon, Kansas, and [Bob Seger]?.