Family name Thiagrajah (Thiagrajah 
) , in all the world, is a very rare surname. The last name Thiagrajah is characteristic of Malaysia, where it is a very rare surname, and Canada, where it is an extremely rare surname. Much less frequently, Thiagrajah is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thiagrajah | South Africa, Canada, Malaysia |