>
Cognomen Thillainathan (Thillainathan
) , in all the world, is quite a rare surname. The family name Thillainathan is habitual in Sri Lanka, where it is quite a rare surname, Malaysia, where it is a rare surname, and Australia. In absolute terms, it is the most numerous in Sri Lanka, Malaysia, and India. Very seldom, Thillainathan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thillainathan | Malaysia, India, Australia, Indonesia, Sri Lanka |