Worldwide, Willium (Willium 
) is quite a rare boy's first name. The given name Willium is habitual in Tanzania, where it is quite a rare masculine name, Pakistan, where it is a very rare male name, and India, where it is an extremely rare boy's name. Also, Willium is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Willium | Myanmar, Pakistan, Tanzania, India, Bangladesh |