Worldwide, Радойка (Radojka 
, Радойка 
) is quite a common female given name. The first name Радойка is characteristic of Southern Europe, particularly Croatia, where it is a common female name, Montenegro, where it is quite a rare feminine name, and Serbia. Measured by absolute frequency, it is commonest in Croatia, Serbia, and Bulgaria. Much less frequently, Радойка is the last name as well as the forename.