Type Word Usage Medieval Slavic Scripts младъ(Church Slavic) Meaning & History Slavic word meaning "young" [1]. Related ItemsDetails Given Name DescendantsMladen(Bulgarian) Mladen, Mladenka(Croatian) Mladen(Macedonian) Mladen, Mladenka(Serbian) Mladen(Slovene) Surname DescendantMladenovski(Macedonian) Sources & References Derksen, Rick. Etymological Dictionary of the Slavic Inherited Lexicon. Brill, 2008, page 323.