Type Word Usage Medieval Slavic Scripts ѣснъ(Church Slavic) Meaning & History Slavic word meaning "clear" [1]. Related ItemsFamily Tree·Details Given Name DescendantsJasna(Croatian) Jasna(Macedonian) Jasna(Serbian) Jasna(Slovene) Sources & References Derksen, Rick. Etymological Dictionary of the Slavic Inherited Lexicon. Brill, 2008, page 153.