Family name Adelaido (Adelaido 
) , across the world, is quite a common cognomen. The surname Adelaido is habitual in Mexico, where it is quite a rare surname, Spain, where it is a rare surname, and the Dominican Republic. Not in comparison with a country's population, this name is the most popular in Mexico, Spain, and Venezuela. Likewise, Adelaido is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Adelaido | Mexico, Brazil, Philippines, United States, Spain |