Cognomen วิทย (Witthaya 
, วิทย ) , around the globe, is a rare surname. The surname วิทย is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is an extremely rare surname. Much more prevalently, วิทย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Witthaya | Germany, Australia, Thailand, United States, Egypt |
| วิทย | Thailand |
ชูทอง, ฐานาริยชัย, and สุวรรณบุตร