Where does “Russian blue potato” come from?

Russian blue potato (English) comes from English Russian, from Latin Russianus, from Medieval Latin Russia, from Medieval Latin Russi, from Old East Slavic Русь, from Finnish ruotsi, from Proto-Finnic *roocci, from Old Swedish roþs- — to row; to separate; loose, sparse, rare.

Russian blue potato (English): A deep purple cultivar of potato believed to have originated in Russia

Definitions

  1. A deep purple cultivar of potato believed to have originated in Russia

Ancestry of “Russian blue potato”, step by step

Russian blue potato traces back through two separate lines of ancestry.

via English Russian

StepLanguageWordMeaning
1EnglishRussianOf or pertaining to Russia; Of or pertaining to...
2LatinRussianus
3Medieval LatinRussia
4Medieval LatinRussiRussians
5Old East SlavicРусьRus; Ruthenia
6FinnishruotsiSwedish
7Proto-Finnic*roocciSwede originally anyone from Roslagen
8Old Swedishroþs-related to rowing
9Old Norseróðrrowing
10Proto-Germanicrōþrąoar; rudder
11Proto-Indo-Europeanh₁reh₁-to row; to separate; loose, sparse, rare

via English blue potato

StepLanguageWordMeaning
1Englishblue potatoA potato characterized by its blue or purple skin and flesh (a result of high concentrations of anthocyanins) and earthy, slightly sweet flavor
2EnglishBlueA letterman at Oxford or Cambridge; A member of...
3Middle Englishblēwe
4Anglo-Normanblewblue
5Middle Frenchbleublue
6Old Frenchblöeblue
7Latvianblāvusaccusative plural masculine form of blāvs
8Old High Germanblāoblue, dark, grey; blue; yellow
9Proto-West Germanicblāublue
10Proto-Germanicblēwazblue; a dark bluish or grey colour, black
11Proto-Indo-Europeanbʰlēw-yellow, blond, grey
Every word from Proto-Indo-European h₁reh₁-Every word from Old Swedish roþs-Every word from Proto-Finnic *roocci
Russian blue potato — Etymology, Origin & Word History | Etymology Explorer