Cognomen Werto (Werto 
) , worldwide, is a very rare surname. The family name Werto is habitual in Mexico, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, Werto is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Werto | Philippines, Mexico, United States, Argentina, Brazil |