Last name Hálfdánarson (Hálfdánarson 
) , around the globe, is a very rare cognomen. The cognomen Hálfdánarson is characteristic of Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Hálfdánarson | Iceland |
| óskar ö hálfdánarson researcher (ORCID 0000-0002-4564-6126) |
|