Surname Лассо (Lazo 
, Lasso 
, Lassus 
) , throughout the world, is a widespread cognomen. The surname Лассо is habitual in Latin America and the Caribbean, particularly El Salvador, where it is a common surname, Nicaragua, and Panama (explore the name in all countries). In absolute terms, it most frequently occurs in Peru, Colombia, and Philippines. Much less frequently, Лассо is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lazo | Peru, Colombia, Philippines, Honduras, El Salvador |
| Lasso | Peru, Colombia, Philippines, Mexico, Honduras |
| Lassus | Peru, France, Argentina, United States, Mexico |
| Лассо | Ukraine |