Where does “краснопёрка” come from?

краснопёрка (Russian) comes from Russian кра́сный, from Old East Slavic красьнъ, from Proto-Slavic krasьnъ, from Proto-Slavic krasa, from Proto-Indo-European kreH- — to shout.

краснопёрка (Russian): rudd; redeye

Definitions

  1. rudd; redeye

Ancestry of “краснопёрка”, step by step

краснопёрка traces back through two separate lines of ancestry.

via Russian кра́сный

StepLanguageWordMeaning
1Russianкра́сныйred; red; beautiful
2Old East Slavicкрасьнъbeautiful
3Proto-Slavickrasьnъbeautiful
4Proto-Slavickrasabeauty
5Proto-Indo-EuropeankreH-to shout

via Russian перо́

StepLanguageWordMeaning
1Russianперо́feather
2Proto-Slavicperòwing
3Proto-Indo-Europeanpéth₂r̥wing; feather
4Proto-Indo-Europeanpeth₂-to spread out; to fly
Every word from Proto-Indo-European kreH- →Every word from Proto-Slavic krasa →Every word from Proto-Slavic krasьnъ →