Family name ทรีย์ (Si 
, ทรีย์ 
) , globally, is a widespread surname. The last name ทรีย์ is characteristic of Macao, where it is a common surname, Myanmar, and Malaysia, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in China, India, and Myanmar. Also, ทรีย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Si | Myanmar, Morocco, India, Indonesia, China |
| ทรีย์ | Thailand |