Family name راديكا (Radhika 
, Radika 
, Radica 
) , in all the world, is a common last name. The cognomen راديكا is habitual in North Macedonia, where it is quite a common surname, Croatia, where it is quite a rare surname, and Fiji. Measured by absolute frequency, it is the most numerous in India, Indonesia, and North Macedonia. Much more prevalently, راديكا is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Radhika | Nepal, India, Sri Lanka, United States, Indonesia |
| Radika | India, Sri Lanka, United Arab Emirates, United States, Indonesia |
| Radica | Serbia, Australia, India, United States, North Macedonia |