Cognomen Olsene (Olsene 
) , worldwide, is an extremely rare last name. The cognomen Olsene is habitual in Northern America, particularly Canada, where it is an extremely rare surname. Much more prevalently, Olsene is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Olsene | Canada, United States, Democratic Republic of the Congo |