Surname Thettan (Thettan 
) , in the world, is a very rare last name. The surname Thettan is habitual in Saudi Arabia, where it is a rare surname, and India, where it is an extremely rare surname. Much less frequently, Thettan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thettan | Myanmar, India, Saudi Arabia |