Where does “Scandinavian noir” come from?

Scandinavian noir (English) comes from English Scandinavian, from English scandinavia, from Latin Scandināvia, from Proto-Germanic *Skadinawjō, from Proto-Germanic awjō, from Proto-Germanic agwjō, from Proto-Indo-European h₂ékʷeh₂ — water.

Ancestry of “Scandinavian noir”, step by step

Scandinavian noir traces back through two separate lines of ancestry.

via English Scandinavian

StepLanguageWordMeaning
1EnglishScandinavianSomeone from Scandinavia; Of Scandinavia; Of the...
2Englishscandinavia
3LatinScandināviaa large and fertile island in Northern Europe, perhaps Zealand or Scania
4Proto-Germanic*SkadinawjōScania
5Proto-Germanicawjōfloodplain; meadow; island
6Proto-Germanicagwjō
7Proto-Indo-Europeanh₂ékʷeh₂water

via English film noir

StepLanguageWordMeaning
1Englishfilm noirA film genre characterized by low-key lighting, a...
2Frenchfilm noirfilm noir
Every word from Proto-Indo-European h₂ékʷeh₂Every word from Proto-Germanic agwjōEvery word from Proto-Germanic awjō