Where does “Mečislav” come from?

Mečislav (Slovak) comes from Slovak sláva, from Proto-Slavic slàva, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “Mečislav”, step by step

Mečislav traces back through two separate lines of ancestry.

via Slovak sláva

StepLanguageWordMeaning
1Slovakslávaglory; fame; celebration
2Proto-Slavicslàvafame; glory; glory, fame
3Proto-Indo-Europeanḱlew-to hear
4Proto-Indo-Europeanḱel-to cover; to incline

via Slovak meč

StepLanguageWordMeaning
1Slovakmečsword
2Proto-SlavicmečьAlternative form of *mь̀čь
3Proto-Germanicmēkijazsword
Every word from Proto-Indo-European ḱel- →Every word from Proto-Indo-European ḱlew- →Every word from Proto-Slavic slàva →