Surname ยิ่งถาวร (ยิ่งถาวร, Yingtavorn 
, Yingthavorn 
) , across the world, is a rare last name. The family name ยิ่งถาวร is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Yingtavorn | United States |
| Yingtaworn, Yingthavorn | Thailand |