Family name แซง (Saeng 
, แซง ) , in the world, is a rare last name. The cognomen แซง is habitual in South-eastern Asia, particularly Malaysia, where it is a rare surname, Thailand, and Myanmar. Not in comparison with a country's population, it is commonest in South-eastern Asia, particularly Thailand, Indonesia, and Malaysia. More frequently, แซง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Saeng | Myanmar, Thailand, Laos, Indonesia, Malaysia |
| แซง | Thailand |