Last name Wilnia (Wilnia 
) , in the world, is an extremely rare family name. The surname Wilnia is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and Brazil. More frequently, Wilnia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wilnia | Philippines, Venezuela, Nicaragua, Brazil, United States |