Family name Grumt (Grumt 
) , all over the world, is a very rare surname. The last name Grumt is habitual in Germany, where it is a very rare surname, Spain, and Chile, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Germany, Brazil, and Spain. Much less frequently, Grumt is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Grumt | Brazil, Spain, Chile, United States, Germany |