Cognomen Hallfreðsson (Hallfreðsson 
) , in all the world, is an extremely rare surname. The surname Hallfreðsson is habitual in Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Hallfreðsson | Iceland |
|
emil hallfreðsson Icelandic footballer, IS (b. 1984) |
|