Around the world, วิทยายุทธ (วิทยายุทธ 
, Vittayut , Vittayayut ) is a very rare masculine forename. The forename วิทยายุทธ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare male name. Very seldom, วิทยายุทธ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| วิทยายุทธ, Vittayut, Vittayayut | Thailand |
Witayarut, Witayaruth, Wittayarut, Wittayayoot, Wittayayut, Wittayoot, Wittayut, Witthayarut, and Witthayut