Cognomen Utarathiyang (Utarathiyang 
) , in all the world, is a very rare last name. The family name Utarathiyang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Utarathiyang | Thailand |
Arun, Santi, Thanakit, Khachonsak, and Kwanruethai