Tartarus, son of *Gaia (Earth) and *Aither (Sky; cf. nyx); and father of *Typhon by (again) Gaia, his own mother (Hes.Theog.822). Tartarus was also the name for the deepest region of the underworld, lower even than *Hades (Hom. Il. 8. 13 ff. with Kirk's n., and Hes. Theog.