Surname เถน (Then 
, เถน 
) , across the world, is a common family name. The last name เถน is characteristic of the Dominican Republic, where it is quite a common surname, Malaysia, and Brunei, where it is quite a rare surname. In absolute terms, this name is the most popular in Indonesia, Malaysia, and the Dominican Republic. Also, เถน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Then | Myanmar, Germany, Dominican Republic, Indonesia, Malaysia |
| เถน | Thailand |