Surname Grøttum (Grøttum 
) , around the world, is a very rare last name. The surname Grøttum is habitual in Northern Europe, particularly Norway, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Grøttum | Norway |
| kåre grøttum Norwegian broadcast host, editor, musician and composer, NO (b. 1934) |
|