It has been proposed that Kušuḫ's name is an adjective derived from the toponym Kuzina, possibly the Hurrian name of Harran. However, in the treaty between Šuppiluliuma I and Šattiwaza, Kušuḫ and the moon god of Harran appear as two separate deities. It has also been noted that Kuzina is only known from a single attestation in the so-called Tale of Appu, whose Hurrian origin is disputed, and researchers such as Itamar Singer consider it to have Hittite roots instead, though this view is not universally accepted either. This text does mention that a moon god was believed to reside in Kuzina, though according to Volkert Haas Arma might be the deity meant. At the same time, he does find the theory that Kuzina was the Hurrian name of Harran plausible. Umbu In addition to Kušuḫ, a secondary name of the moon god in Hurrian sources was Umbu, also spelled Umpu, Umpa and Umpi. It might have been originally in use somewhere in Syria or southern Anatolia as a part of a distinct local tradition, which would mean it only came to be adopted by the Hurrians at some point in their history. However, it is also possible that it has Hurrian origin, as a root umb- (meaning presently unknown), is attested in the Hurrian language. It has been proposed that Umbu functioned as the name of a specific manifestation of Kušuḫ, perhaps representing the full moon, though this remains speculative. Mauro Giorgieri notes that attestations of Umbu as a fully independent deity are uncommon, and that he almost always appears alongside Nikkal. In early scholarship it was assumed that Umbu was an appellative referring to Nikkal, analogous to the second element in the full Ugaritic form of her name, Nikkal-wa-Ib, but according to Giorgieri this is not plausible in the light of more recent research. The latter epithet is most likely a cognate of either Akkadian inbu, "fruit," or ebbu, "bright" or "pure," rather than Umbu's name. Character and iconography Kušuḫ was functioned as the good of the moon in the Hurrian pantheon. It is possible that his character was at least in part influenced by that of his Mesopotamian counterpart, Sin. Like him, he was associated with pregnancy, and could be invoked in birth incantations. However, a well attested role of Kušuḫ which according to Gernot Wilhelm sets him apart from his Mesopotamian counterpart was that of a