The name Nirah means "little snake" in Sumerian. It could be written with the
logogram dMUŠ (), as already attested in third millennium BCE texts from
Ebla. However, this logogram could also designate
Ištaran,
Ninazu, the tutelary god of
Susa,
Inshushinak, the tutelary god of
Eshnunna,
Tishpak, and the primordial river deity
Irḫan. With a different determinative, mulMUŠ, it referred to the constellation
Hydra. Syllabic spellings are also attested, for example
Ne-ra-aḫ,
Ni-laḫ5,
Ni-ra-aḫ and
Ni-ra-ḫu. Nirah was at times confused with Irḫan, originally the name of the western branch of the Euphrates, personified as a deity. The early history of these two deities is not fully understood, and it has been proposed that their names were
cognate with each other, though the view that they shared the same origin is not universally accepted. Nirah could be called the "lord of the underworld," though he shared this epithet with many other gods, including
Ninazu,
Ningishzida,
Nergal, and the primordial deity
Enmesharra. Ropes or intestines could be compared to Nirah in Mesopotamian literature, for example in an inscription of
Gudea, in a hymn to
Shulgi, and in incantations. ==Iconography==