Throughout the world, วิบูลย์ศักดิ์ (วิบูลย์ศักดิ์ 
, Wiboonsak , Wibunsak ) is a rare predominantly male, but very seldom girly first name. The given name วิบูลย์ศักดิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare principally masculine, but very infrequently female name. Very seldom, วิบูลย์ศักดิ์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Viboonsak, Wibunsak, วิบูลย์ศักดิ์, Wiboonsak | Thailand |