63%RatingSave Gender Masculine Usage Croatian, Serbian Scripts Ратко(Serbian) Pronounced Pron. /ˈrât.ko/ [key·simplify] Meaning & History Originally a diminutive of names beginning with the Slavic element radŭ meaning "happy, willing". Related NamesFamily Tree·Details RootradŭVariantRadoš(Serbian) Feminine FormsRadojka(Croatian) Radinka, Radojka(Serbian) Other Languages & CulturesRadko, Rayko, Rayno(Bulgarian) Radek, Radim, Radko, Radúz(Czech) Radzim(Polish) Radu(Romanian) Name DaysName Days? Croatia: February 19Croatia: April 3Croatia: June 28 Categories diminutives, isograms, NBA players, war