Cognomen Gromovoi (Gromovoi 
, Громовой 
) , in all the world, is a rare last name. The surname Gromovoi is characteristic of Russia, where it is a rare surname, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Gromovoi | France, Russia |
| Громовой | Kyrgyzstan, Russia, Kazakhstan, Ukraine |