The etymology of the name Shalash is unknown. Based on the attestations in the Ebla texts, theories of Hurrian origin can be rejected. However, as noted by Alfonso Archi, there is no plausible Semitic etymology either, similar as in the case of other Syrian deities like Kubaba or Aštabi. Lluis Feliu proposes that it might have originated in an unknown substrate language.
Shalash was the wife of Dagan, and together they stood at the head of the pantheon of the middle Euphrates area in ancient Syria. No known text specifies if she was believed to have any ancestors. It is assumed that Adad was viewed as her son in Mari. Lluis Felieu additionally proposes that Hebat, the goddess of Halab (Aleppo) was a daughter of Shalash and Dagan.
In the texts from Ebla, Shalash is also associated with Wada'an(u), a god distinct from Dagan, worshiped in Gar(r)amu rather than Tuttul. Alfonso Archi proposes that they were regarded as consorts. It is assumed that his name had origin in a Semitic language. Unlike Dagan, Wada'an is not attested in any later sources.
Lluis Felieu rejects the possibility that the two were originally the same, and especially that the confusion between them was caused by Dagan being a weather god himself and thus analogous to Adad. He also notes that Shala is well attested in art as a goddess associated with the weather, while the character of Shalash, based on parallels with the wives of heads of other pantheons of ancient Near East (for example Ninlil, wife of Enlil and Athirat, wife of El), would be unlikely to resemble that of the wife of the Mesopotamian weather god. Additionally, the spelling of the name of the goddess paired with Adad in devotional inscriptions is consistent between various time periods and languages, and never ends with a sibilant.
There is very little evidence for confusion of the two goddesses in Hurrian and Hittite sources. Daniel Schwemer considers a treaty of king Shattiwaza to be one example. Lluis Felieu proposes that for Hurrians and Hittites the source of confusion might have been the fact the final -š in the name of Shalash name could be interpreted as a case ending in their languages, but he also remarks that the only possible instances might also represent simple scribal mistakes.
The earliest attestations of Shalash come from Ebla from the third millennium BCE. There is no indication she was commonly worshiped in that period, however. She was associated with the god Wada'an(u) worshiped in Gar(r)amu, a city in the Eblaite territory. In the documents of the royal vizier Ibrium there is also evidence for an association between dsa-a-ša (Shalash) and DBE du-du-luki, "lord of Tuttul," a title of Dagan. A statue of Shalash was apparently an object of cult in Tuttul.
In later periods the cult of Shalash is well attested in Tuttul, and Alfonso Archi goes as far as proposing that the view that she was the wife of Dagan originated in this city. However, there is presently no evidence that she was worshiped in the other cult center of her husband, Terqa.
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