Cognomen Sunittaya (Sunittaya 
) , across the world, is an extremely rare family name. Much more frequently, Sunittaya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sunittaya | Thailand |
Mekswang, Jinabun, Bunyayuwa, Permsilp, Sirisriwongsa, Sripattha, Tanatchang, and Hongsapinunt