Cognomen Lonso (Lonso 
) , in all the world, is a rare surname. The last name Lonso is characteristic of Argentina, where it is a very rare surname, Spain, and China, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in China, Argentina, and the United States. Likewise, Lonso is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lonso | Philippines, Argentina, United States, India, China |