Surname ธอร์น (Tho 
, ธอร์น 
) , around the world, is a common cognomen. The last name ธอร์น is characteristic of Malaysia, where it is quite a common surname, Macao, and Maldives, where it is quite a rare surname. Measured by absolute frequency, the name is most common in South-eastern Asia, particularly Malaysia, Vietnam, and Indonesia. Likewise, ธอร์น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tho | Myanmar, Vietnam, United States, Indonesia, Malaysia |
| ธอร์น | Thailand |