Family name Sãñ (Sãñ 
) , worldwide, is a rare cognomen. The surname Sãñ is characteristic of South-eastern Asia, particularly Myanmar, where it is quite a rare surname, and Thailand, where it is an extremely rare surname. Very seldom, Sãñ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sãñ | Myanmar, Algeria, Thailand |