Family name Thayaseelan (Thayaseelan 
) , globally, is a very rare surname. The last name Thayaseelan is characteristic of Australia, where it is a very rare surname, and the United Kingdom. More frequently, Thayaseelan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thayaseelan | Australia, Sri Lanka, United Kingdom, Canada, South Africa |