Cognomen والدو (Waldo 
, Valdo 
, والدو) , throughout the world, is a common family name. The surname والدو is characteristic of Mexico, where it is quite a rare surname, Cameroon, and Nicaragua. In absolute terms, this name is the most popular in Mexico, the United States, and Indonesia. More prevalently, والدو is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Waldo | Mexico, Brazil, United States, Argentina, Bolivia |
| Valdo | Democratic Republic of the Congo, Mexico, Brazil, United States, Argentina |