This has opened up a whole new world for me to explore.

And a reminder not to trust Google Translate.

I've been listening to the albums of Honndalstausene and many of the track titles have the form:

[Dance style] etter [Musician]

so I'm guessing 'etter' in this context means 'by'

Would love to know more as the usual internet sources aren't very helpful for this monolinguist.

And what about Teige-Ola, Gamle-Lars Thomasgård, Kristense Mardal, Magne Maurset, Jon Rosenlid and Anders Reed?

All the best
Barry