Family name Inthavorn (Inthavorn 
, อินถาวร , อินทรถาวร ) , around the globe, is a rare surname. The family name Inthavorn is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| อินถาวร, อินทรถาวร, Inthavorn | Thailand |