Cognomen Wilium (Wilium 
) , in the entire world, is a rare family name. The family name Wilium is habitual in Tanzania, where it is a rare surname, the United States, where it is an extremely rare surname, and India. Likewise, Wilium is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wilium | Tanzania, India, Nigeria, United States, Pakistan |