Last name ثين (Thein 
, Theine 
, ثين) , in the world, is a widespread cognomen. The cognomen ثين is characteristic of Myanmar, where it is a common surname, Mongolia, and Luxembourg, where it is quite a common surname (explore the name in all countries). In absolute terms, it is commonest in Myanmar, Mongolia, and Malaysia. Likewise, ثين is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thein | Germany, Malaysia, Indonesia, Mongolia, Myanmar |
| Theine | Germany, France, Brazil, United States, Myanmar |