Worldwide, ทิวสน (ทิวสน 
, Tewson 
, Thiwon 
) is a very rare epicene forename. The forename ทิวสน is habitual in South-eastern Asia, particularly Thailand, where it is a very rare mostly male, but infrequently feminine name. More prevalently, ทิวสน is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| ทิวสน, Thiwsaisan | Thailand |
| Tewson | Canada, United Kingdom, United States, South Africa, Australia |
| Thiwon | Thailand, India |
Tewwad, Thewsawang, Thuadsin, Tiewchaloern, Tiwson, Tudsoeng, Tuewson, and Tulsuk