Cognomen ถิ (Thi 
, ถิ 
) , globally, is a widespread surname. The family name ถิ is habitual in Mongolia, where it is a common surname, Myanmar, and Vietnam, where it is quite a common surname (explore the name in all countries). More frequently, ถิ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thi | Myanmar, Vietnam, France, Mongolia, Malaysia |
| ถิ | Thailand |