Type Element Usage Medieval Slavic Meaning & History Slavic element meaning "more, better" [1]. Family Tree·DetailsRelated Items Given Name DescendantsBoleslav, Boleslava(Czech) Bolesław, Bolesława(Polish) Boleslav, Boleslava(Russian) Sources & References Derksen, Rick. Etymological Dictionary of the Slavic Inherited Lexicon. Brill, 2008, page 52. Entry updated February 4, 2020 ·