Where does “Vjatšeslav” come from?

Vjatšeslav (Finnish) comes from Russian Вячесла́в, from Old Russian Вѧчеславъ, from Proto-Slavic *Vęťeslàvъ, from Proto-Slavic slàva, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “Vjatšeslav”, step by step

StepLanguageWordMeaning
1RussianВячесла́в—
2Old RussianВѧчеславъ—
3Proto-Slavic*Vęťeslàvъ—
4Proto-Slavicslàvafame; glory; glory, fame
5Proto-Indo-Europeanḱlew-to hear
6Proto-Indo-Europeanḱel-to cover; to incline
Every word from Proto-Indo-European ḱel- →Every word from Proto-Indo-European ḱlew- →Every word from Proto-Slavic slàva →