Cognomen Ольсен (Olsen 
, Holsen 
, Olssen 
) , all around the world, is a widespread family name. The cognomen Ольсен is habitual in Greenland, where it is a prevalent surname, Norway, where it is a widespread surname, and Denmark (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in the United States, Norway, and Denmark. Very seldom, Ольсен is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Olsen | Democratic Republic of the Congo, Denmark, Canada, United States, Norway |
| Holsen | Democratic Republic of the Congo, Canada, United Kingdom, United States, Norway |
| Olssen | Australia, Denmark, Canada, United States, Norway |
| Ольсен | Russia, Ukraine |