Strömstare, Cinclus cinclus - is 'dipper'. Ström and English stream and variants of the same word in all Germanic languages I know of comes from Germanic *straumaz ‘current, river’, from the Indoeuropean root *sreu- ‘to flow’, from which also comes Greek rhythmos ‘rhythm (of the waves). And stare and English starling, and German Star come from Germanic *star, from an Indoeuropean stem *storo-, from which also comes Latin sturnus, all with the meaning ‘starling'.
The English name, dipper, is very characteristic, the way he sits curtsying close to the water and dives into the stream. He is Norway’s national bird; there he is called fossekall (foss is ‘waterfall’ and kall is ‘bloke’ (I believe)).
Dipper also means ‘ladle’ and ‘baptist’, and in America the Big Dipper is the star constellation Ursa major, in Swedish Karlavagnen.
The English verb dip comes from Germanic *duppjan, from which also comes Swedish döpa – ‘to baptise’ and doppa – ‘to dip’.
I made a blog entry about this bird last February too, but this time I got closer: