Where does “rödtrast” come from?

rödtrast (Swedish) comes from Swedish röd, from Old Swedish rø̄þer, from Old Norse rauðr, from Old English dūn, from Proto-Germanic *dūnā, from Proto-Celtic dūnom, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

rödtrast (Swedish): Naumann's thrush, (Turdus naumanni)

Definitions

Naumann's thrush, (Turdus naumanni)

Ancestry of “rödtrast”, step by step

rödtrast traces back through two separate lines of ancestry.

via Swedish röd

Step	Language	Word	Meaning
1	Swedish	röd	red; of or pertaining to leftist politics and...
2	Old Swedish	rø̄þer	—
3	Old Norse	rauðr	red
4	Old English	dūn	hill, down; hill, dune; hill, mountain
5	Proto-Germanic	*dūnā	—
6	Proto-Celtic	dūnom	stronghold, rampart
7	Proto-Indo-European	dʰewh₂-	smoke; mist, haze

via Swedish trast

Step	Language	Word	Meaning
1	Swedish	trast	a thrush
2	Old Norse	þrǫstr	thrush
3	Proto-Germanic	þrastuz	thrush
4	Proto-Indo-European	trósdos	—

Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Celtic dūnom →Every word from Proto-Germanic *dūnā →