Surname Gromadina (Gromadina 
, Громадина 
) , worldwide, is a rare cognomen. The last name Gromadina is habitual in Montenegro, where it is quite a rare surname, Russia, where it is a rare surname, and Kazakhstan, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Gromadina | Montenegro, Russia |
| Громадина | Kazakhstan, Ukraine, Russia |