Radko is a masculine given name used primarily in Bulgarian and Czech. It originated as a diminutive of names beginning with the Slavic element radŭ meaning "happy, willing". As such, Radko carries connotations of joy and good will.Variants and related formsAmong Bulgarian variants, Rayko and Rayno are related. The name has several Czech equivalents: Radek (a common standalone diminutive), Radim, and Radúz. Feminine forms include Bulgarian Radina and Raina/Rayna 1, and Czech Radka. Across the Slavic world, cognates include South Slavic Ratko, Polish Radzim, Romanian Radu, and Serbo-Croatian Radoš. Bulgarian surnames derived from Radko include Radkov and Radkova.Pronunciation and usageIn Czech, Radko is pronounced [ˈratko]. While common as a first name, it also exists as a surname in the region.Meaning: derived from Slavic element *radŭ meaning "happy, willing"Origin: Slavic, via a diminutive suffixType: given name (masculine)Usage regions: Bulgarian, Czech