Cognomen Wiliyam (Wiliyam 
) , worldwide, is a rare family name. The surname Wiliyam is habitual in Ethiopia, where it is a very rare surname, Indonesia, and India, where it is an extremely rare surname. Also, Wiliyam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wiliyam | Indonesia, Ethiopia, Malaysia, Nigeria, India |