Where does “Blaufelchen” come from?

Blaufelchen (German) comes from German Blau, from Middle High German blā, from Old High German blāo, from Proto-West Germanic blāu, from Proto-Germanic blēwaz, from Proto-Indo-European bʰlēw- — yellow, blond, grey.

Blaufelchen (German): Coregonus wartmanni, a species of whitefish endemic to Lake Constance in southern Germany

Definitions

  1. Coregonus wartmanni, a species of whitefish endemic to Lake Constance in southern Germany

Ancestry of “Blaufelchen”, step by step

Blaufelchen traces back through two separate lines of ancestry.

via German Blau

StepLanguageWordMeaning
1GermanBlauthe colour blue; a particular tone of blue; a...
2Middle High Germanblāblue
3Old High Germanblāoblue, dark, grey; blue; yellow
4Proto-West Germanicblāublue
5Proto-Germanicblēwazblue; a dark bluish or grey colour, black
6Proto-Indo-Europeanbʰlēw-yellow, blond, grey

via German Felchen

StepLanguageWordMeaning
1GermanFelchenwhitefish freshwater fish in the genus
2Middle High Germanvelche
Every word from Proto-Indo-European bʰlēw-Every word from Proto-Germanic blēwazEvery word from Proto-West Germanic blāu