Family name Gromul (Gromul 
) , throughout the world, is a very rare cognomen. The family name Gromul is habitual in Poland, where it is a rare surname, Germany, where it is an extremely rare surname, and the United States. More frequently, Gromul is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gromul | United States, Poland, Germany |