Last name Ólsen (Ólsen 
) , around the globe, is an extremely rare cognomen. The family name Ólsen is habitual in Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ólsen | Iceland |
|
björn m. ólsen Icelandic politician (1850-1919), IS (b. 1850) |
|