Cognomen Hróðmarsson (Hróðmarsson 
) , around the world, is an extremely rare last name. The surname Hróðmarsson is characteristic of Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Hróðmarsson | Iceland |
| hjörleifur hróðmarsson Helped settle Iceland, IS (b. 845) |
|