Where does “Rostislav” come from?

Rostislav (Czech) comes from Old Czech Rostislav, from Proto-Slavic orstъ, from Proto-Slavic slàva, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “Rostislav”, step by step

StepLanguageWordMeaning
1Old CzechRostislav—
2Proto-Slavicorstъgrowth
3Proto-Slavicslàvafame; glory; glory, fame
4Proto-Indo-Europeanḱlew-to hear
5Proto-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 →