Cognomen Carlso (Carlso 
) , in the world, is a very rare surname. The last name Carlso is habitual in Argentina, where it is a very rare surname, Spain, and Venezuela. In absolute terms, this name is the most popular in Argentina, the United States, and Spain. More prevalently, Carlso is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Carlso | Brazil, United States, Argentina, Peru, Spain |