All around the world, Willier (Willier 
) is a very rare predominantly boy's, but scarcely female first name. The forename Willier is habitual in Peru, where it is a very rare boy's name, Philippines, and Brazil, where it is an extremely rare dominantly boy's, but infrequently feminine name. More prevalently, Willier is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Willier | Canada, Senegal, Philippines, United States, France |