Last name Рудаиа (Rudaya 
, Rudaia 
, Рудаиа ) , all over the world, is a rare family name. The last name Рудаиа is habitual in Belarus, where it is a rare surname, Georgia, and Czechia. In absolute terms, it is commonest in Russia, Belarus, and the United States. Likewise, Рудаиа is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rudaya | Belarus, India, United States, Germany, Russia |
| Rudaia | India, Georgia, Germany, Russia, Czechia |
| Рудаиа | Russia |