Family name Sèìñ (Sèìñ 
) , throughout the world, is a very rare cognomen. The cognomen Sèìñ is habitual in South-eastern Asia, particularly Myanmar, where it is a very rare surname. Also, Sèìñ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sèìñ | Myanmar |