Family name Ariyakajorn (Ariyakajorn 
) , globally, is a very rare surname. The surname Ariyakajorn is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ariyakajorn | Thailand |
Piyaphon, Piyaporn, Chaimongkol, and Watcharachai