Cognomen Thillaiyappan (Thillaiyappan 
) , all over the world, is an extremely rare family name. The last name Thillaiyappan is habitual in Malaysia, where it is an extremely rare surname, and India. Also, Thillaiyappan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thillaiyappan | Malaysia, India |