*Deh₂nu

*Deh₂nu- is a proposed Proto-Indo-European goddess of rivers based on the Vedic goddess Dānu, the Irish goddess Danu, the Welsh goddess Dôn and the names of the rivers Danube,[1] Don, Dnieper, and Dniester. Mallory and Adams however note that while the lexical correspondence is probable, "there is really no evidence for a specific river goddess" in Proto-Indo-European mythology "other than the deification of the concept of ‘river’ in Indic tradition".[2] Some have also proposed the reconstruction of a sea god named *Trih₂tōn based on the Greek god Triton and the Old Irish word trïath, meaning "sea". Mallory and Adams also reject this reconstruction as having no basis, asserting that the "lexical correspondence is only just possible and with no evidence of a cognate sea god in Irish."[2] It is also linked to Ossetian Donbettyr who is offered “three scones with honey” for turning their waterwheels.[3] Donnán of Eigg is considered a possible Christianized version of this deity.[4][5]

There’s a central Asian river called Dan which may also be related[6]

In many Indo-European traditions she is said to be a mother goddess of mythological tribe, the *Deh₂newyóes, which is reconstructed on the basis of Vedic Danavas, Irish Tuatha Dé Danann, Greek Danaoi and Norse Danes. It is seen that they, together with their leader Bel, having fought a hero called *H₂nḗrtos, with possible descendants including Nart from the Nart saga, nṛtama (epithet of Indra), and Norse Njord.[5]