Where does “チェコ” come from?

チェコ (Japanese) comes from Japanese チェコスロバキア, from English Czecho-, from English Czech, from Polish Czech, from Czech čech, from Old Czech Čech, from Proto-Slavic čelověkъ, from Proto-Indo-European (s)kʷel- — to turn.

Ancestry of “チェコ”, step by step

StepLanguageWordMeaning
1JapaneseチェコスロバキアCzechoslovakia
2EnglishCzecho-
3EnglishCzechOf, from, or pertaining to the Czech Republic,...
4PolishCzechCzech man; Bohemian man
5Czechčech
6Old CzechČechCzech person
7Proto-Slavicčelověkъman, human
8Proto-Indo-European(s)kʷel-crowd, people
9Proto-Indo-Europeankʷel-to turn
Every word from Proto-Indo-European kʷel-Every word from Proto-Indo-European (s)kʷel-Every word from Proto-Slavic čelověkъ