Family name Amornrattanachaiyakul (Amornrattanachaiyakul 
) , globally, is an extremely rare cognomen. The last name Amornrattanachaiyakul is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Amornrattanachaiyakul | Thailand |