Last name เทสิน (Thesin 
, เทสิน 
) , across the world, is a rare cognomen. The last name เทสิน is habitual in Belgium, where it is a rare surname, France, where it is a very rare surname, and Thailand. Not in comparison with a country's population, it is commonest in Brazil, France, and Thailand. Likewise, เทสิน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thesin | Brazil, France, South Africa, Belgium, India |
| เทสิน | Thailand |