Where does “Karelia” come from?

Karelia (Polish) comes from Russian Каре́лия, from Medieval Latin Carelia, from Swedish Karelen, from Finnish Karjala, from Finnish karja, from Proto-Germanic harjaz, from Proto-Indo-European kóryos, from Proto-Indo-European ḱer- — army.

Ancestry of “Karelia”, step by step

StepLanguageWordMeaning
1RussianКаре́лия
2Medieval LatinCarelia
3SwedishKarelen
4FinnishKarjalaKarelia
5Finnishkarjacattle domesticated bovine animals sometimes with a specifier
6Proto-Germanicharjazarmy; army leader; commander; warrior
7Proto-Indo-Europeankóryoswar; troops; army; war, troops
8Proto-Indo-Europeanḱer-to grow, to make grow, to nourish; to plait,...
9Proto-Indo-Europeankr̥-to turn, to bend
10Proto-Indo-Europeanker-army

Words derived from “Karelia

Every word from Proto-Indo-European ker-Every word from Proto-Indo-European kr̥-Every word from Proto-Indo-European ḱer-