Surname แสงไทย (แสงไทย 
, Sangthai 
, Saengthai ) , globally, is a rare cognomen. The last name แสงไทย is characteristic of Thailand, where it is a rare surname, Myanmar, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, แสงไทย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| แสงไทย | Thailand |
| Sangthai | United States, India, Thailand, Myanmar |
| Saengthai | United States, Thailand |