Where does “Caspian roach” come from?

Caspian roach (English) comes from English roach, from Middle English roche, from Old French roche, from Persian رخ, from Middle Persian lhw', from Sanskrit रथ, from Proto-Indo-Iranian Hrátʰas, from Proto-Indo-European Hrót-h₂-os — to roll; wheel; to run, roll.

Caspian roach (English): a fish found in brackish coastal waters of the...

Definitions

  1. a fish found in brackish coastal waters of the...

Ancestry of “Caspian roach”, step by step

Caspian roach traces back through two separate lines of ancestry.

via English roach

StepLanguageWordMeaning
1EnglishroachCertain members of the fish family Cyprinidae,...
2Middle Englishroche
3Old Frenchrocherock
4Persianرخrook; cheek; face
5Middle Persianlhw'rook, castle
6Sanskritरथchariot, car, especially a two-wheeled...
7Proto-Indo-IranianHrátʰaschariot
8Proto-Indo-EuropeanHrót-h₂-os
9Proto-Indo-EuropeanHret-to roll; wheel; to run, roll

via English Caspian

StepLanguageWordMeaning
1EnglishCaspianOf or pertaining to Caspian Sea or the region...
2LatinCaspiusCaspian; discovered or native to an area in or...
3Ancient GreekΚάσπιοςCaspian
Every word from Proto-Indo-European Hret-