Cognomen Viniyakul (Viniyakul 
) , throughout the world, is an extremely rare family name. The last name Viniyakul is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Viniyakul | Thailand |
Vinai, Supanut, Sermsri, and Waranthorn