Across the world, เทสิน (Thesin 
, เทสิน 
) is a very rare epicene first name. The given name เทสิน is habitual in Southern Asia, particularly India, where it is an extremely rare mostly feminine, but uncommonly boy's name. Also, เทสิน is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Thesin | Belgium, South Africa, India, France, Brazil |
| เทสิน | Thailand |