Family name Thummaruksa (Thummaruksa 
) , all around the world, is a very rare cognomen. The cognomen Thummaruksa is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thummaruksa | Thailand |
Thanaporn, Chidchanok, and Ratchadawan