Surname Olso (Olso 
) , in the entire world, is a very rare cognomen. The last name Olso is characteristic of Norway, where it is a rare surname, Honduras, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in the United States, Norway, and Brazil. Very seldom, Olso is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Olso | Norway, Brazil, United States, Venezuela, Spain |