Around the world, Oneldo (Oneldo 
) is a very rare primarily male, but very infrequently female first name. The forename Oneldo is characteristic of Latin America and the Caribbean, particularly Argentina, where it is a very rare boy's name, and Brazil, where it is an extremely rare masculine name. Much less frequently, Oneldo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Oneldo | Mexico, Brazil, Argentina, Ecuador, Philippines |