Cognomen Рябои (Рябои 
, Riaboi 
, Ryaboi 
) , in the world, is a rare surname. The surname Рябои is habitual in Lithuania, where it is a rare surname, Portugal, where it is a very rare surname, and Spain. In absolute terms, it is commonest in the United States, Russia, and Spain.
| VARIANT | COUNTRY |
|---|---|
| Рябои | Russia |
| Riaboi | Thailand, Argentina, Ukraine, United States |
| Ryaboi | Canada, Russia, Ukraine |
| Ryaboy | Portugal, Russia, Spain, United States, Lithuania |