45%RatingSave Gender Masculine Usage Czech (Rare) Pronounced Pron. /ˈra.duːs/ [key·simplify] Meaning & History Derived from Czech rád meaning "happy, glad". The Czech author Julius Zeyer probably created it for a character in his play Radúz and Mahulena (1898). Related NamesFamily Tree·Details RootradŭVariantsRadek, Radko, RadimFeminine FormRadkaOther Languages & CulturesRadko, Rayko, Rayno(Bulgarian) Ratko(Croatian) Radzim(Polish) Radu(Romanian) Radoš, Ratko(Serbian) Name DaysName Days? Slovakia: December 10 Categories feelings, happiness, invented, literature, rare Czech