Where does “Bolek” come from?

Bolek (Czech) comes from Czech Boleslav, from Old Czech Boleslav, from Proto-Slavic *boľьjь, from Proto-Slavic slàva, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “Bolek”, step by step

StepLanguageWordMeaning
1CzechBoleslav—
2Old CzechBoleslav—
3Proto-Slavic*boľьjьbigger, greater
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 →