(Osm.) evren 'dragon', cf. mod. 'heaven vault' ( < `snake-rainbow' ?)

snake

Proto-Turkic: *ebren
Altaic etymology: Altaic etymology
Proto-Altaic: *ebVrV
Nostratic: Nostratic
Russian meaning: змея
Turkic: *ebren
Tungus-Manchu: *ūre
Japanese: *bǝ̀rǝ̀tì ( ~ -ua-)
Comments: EDT 14.
Turkish: (Osm.) evren 'dragon', cf. mod. 'heaven vault' ( < `snake-rainbow' ?)
Middle Turkic: MKypch. ewren 'adder' (Houts.)
Chuvash: vǝʷre śǝlen 'dragon' (lit. 'hot snake'), vereni (Bulg.)
Gagauz: ievrem 'fiery snake'