Cognomen Utayan (Utayan 
) , worldwide, is a very rare last name. The family name Utayan is habitual in Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Predominantly, Utayan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Utayan | India, Thailand |
Chakma, Tongdee, and Ponnuthurai