Orpheus (north east Danube valley) and even describes him wandering into Hyperborea and Tanais (ancient Greek city in the Don river delta) due to his grief. The story of Eurydice may actually be a late addition to the Orpheus myths. In particular, the name "Eurudike" ("she whose justice extends widely") recalls cult-titles attached to Persephone. According to the theories of poet Robert Graves, the myth may have been derived from another Orpheus legend, in which he travels to Tartarus and charms the goddess Hecate. The myth theme of not looking back, an essential precaution in Jason's raising of chthonic Brimo Hekate
Hades then a subscript marking (), and finally omitted entirely (). Perhaps from fear of pronouncing his name, around the 5th century BC, the Greeks started referring to Hades as Plouton ( "Ploútōn"), with a root meaning "wealthy", considering that from the abode below (i.e., the soil) come riches (e.g., fertile crops, metals and so on). Plouton became the Roman god who both rules the underworld and distributed riches from below. This deity was a mixture of the Greek god Hades and the Eleusinian icon Ploutos, and from this he also received a priestess, which was not previously practiced in Greece.