Surname Вільйо (Viljo 
, Wiljo 
, Вільйо 
) , in the entire world, is a very rare cognomen. The family name Вільйо is habitual in Northern Europe, particularly Finland, where it is a rare surname, and Estonia. More prevalently, Вільйо is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Viljo | India, Canada, United States, Sweden, Finland |
| Wiljo | Philippines, Netherlands, India, United States, Germany |
| Вільйо | Ukraine |