Surname Grunnan (Grunnan 
) , all over the world, is a very rare cognomen. The last name Grunnan is characteristic of Norway, where it is a rare surname, Denmark, and Canada, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Norway, the United States, and Denmark.
| VARIANT | COUNTRY |
|---|---|
| Grunnan | Denmark, United States, Norway, Canada |
| haakon grunnan Norwegian businessperson, NO (b. 1956) |
|