Globally, William Adolfo (William Adolfo 
) is a rare boy's given name. The given name William Adolfo is habitual in Latin America and the Caribbean, particularly Costa Rica, where it is quite a rare masculine name, Peru, where it is a rare male name, and Chile. Very seldom, William Adolfo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| William Adolfo | Peru, Chile, Ecuador, Colombia, Costa Rica |