Surname Rorstrom (Rorstrom 
) , all around the world, is a very rare cognomen. The family name Rorstrom is characteristic of Norway, where it is a rare surname, Denmark, and Canada, where it is a very rare surname. Not in comparison with a country's population, it is commonest in the United States, Norway, and Denmark.
| VARIANT | COUNTRY |
|---|---|
| Rorstrom | Denmark, Canada, United States, Brazil, Norway |