Family name Thiyagaraja (Thiyagaraja 
) , in all the world, is quite a rare cognomen. The surname Thiyagaraja is characteristic of Sri Lanka, where it is quite a rare surname, Malaysia, where it is a rare surname, and Australia, where it is a very rare surname. In absolute terms, it is commonest in Sri Lanka, Malaysia, and India. Much less frequently, Thiyagaraja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thiyagaraja | Australia, India, Sri Lanka, Malaysia, Qatar |