Where does “Ĉeĥio” come from?

Ĉeĥio (Esperanto) comes from Esperanto ĉeĥo, from Czech čech, from Old Czech Čech, from Proto-Slavic čelověkъ, from Proto-Indo-European (s)kʷel-, from Proto-Indo-European kʷel- — to turn.

Ancestry of “Ĉeĥio”, step by step

StepLanguageWordMeaning
1Esperantoĉeĥoa Czech person
2Czechčech—
3Old CzechČechCzech person
4Proto-Slavicčelověkъman, human
5Proto-Indo-European(s)kʷel-crowd, people
6Proto-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 →