Cognomen Rudika (Rudika 
, Рудика 
) , all over the world, is quite a rare family name. The surname Rudika is habitual in Ukraine, where it is quite a rare surname, Indonesia, where it is a very rare surname, and Kazakhstan. Not in comparison with a country's population, this name is the most popular in Ukraine, Indonesia, and Russia. Very seldom, Rudika is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rudika | Indonesia, Sri Lanka, India, France, Croatia |
| Рудика | Ukraine, Kazakhstan, Russia |