Cognomen ไซท์ (Sai 
, ไซท์ 
) , in the entire world, is a widespread last name. The family name ไซท์ is habitual in Mongolia, where it is a prevalent surname, Myanmar, where it is a common surname, and Malaysia, where it is quite a common surname (explore the name in all countries). In absolute terms, this name is the most popular in Myanmar, India, and Mongolia. More frequently, ไซท์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sai | Myanmar, India, Mongolia, Malaysia, China |
| ไซท์ | Thailand |