Cognomen Thesun (Thesun 
, ดวงอาทิตย์ 
) , around the globe, is a rare last name. The family name Thesun is characteristic of Thailand, where it is a rare surname, Egypt, where it is a very rare surname, and China, where it is an extremely rare surname. Also, Thesun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thesun | China, South Africa, Egypt, India, Myanmar |
| ดวงอาทิตย์ | Thailand |