Namtar's name means "fate" in Sumerian. It can be differentiated from the ordinary word "fate" in Sumerian texts due to being preceded by the
dingir sign, so-called divine determinative, used to identify the names of deities. The same name was used in Akkadian, written as
dnam-ta-ru. Jacob Klein notes that true to his name, Namtar was most likely understood as the personification of unavoidable fate, implicitly understood as death. Aicha Rahmouni compares the role of Namtar in Mesopotamian beliefs to that played by
Mot, the personified death, in
Ugaritic texts. The primary roles of Namtar in the Mesopotamian pantheon were those of a minor god of the
underworld and of a disease demon, especially strongly associated with headaches and heart pain. While his two roles were interconnected, according to Jacob Klein the precise development of his character is presently impossible to discern. Barbara Böck proposes that he was initially only a disease demon, and developed into Ereshkigal's sukkal at some point in the second millennium BCE. His appearance was typically described as fearsome, with references to such traits as "twisted hands" or "mouth filled with venom." The
Underworld Vision of an Assyrian Prince states that he could be depicted slaying a man with a sword. No attestations of Namtar as a deity are known from before the
Old Babylonian period. While the word
namtar, without the divine determinative. does appear in personal names from the earlier
Ur III period, they are unlikely to refer to him, as according to Dina Katz,
theophoric names invoking him are not known from later periods, similar as in the case of his mistress Ereshkigal. Namtar is generally absent from offering lists, indicating he had no active cult. Making offerings to him is nonetheless mentioned in a few literary texts, including
Death of Gilgamesh and
Death of Ur-Namma, in both cases being undertaken by the eponymous protagonist. Incantations indicate that the medicine goddess
Ninisina was invoked to counter Namtar's influence. The same function was also attributed to
Asalluhi. However, Namtar could in turn be implored to take care of other demons, for example an incantation against
Mimma Lemnu, the personified "Any Evil," entrusts him with keeping this being imprisoned in the underworld. An incantation addressed to the fire god
Girra asks him to hand over the enemies of the petitioner to Namtar. ==Associations with other deities==