Cognomen สมายล์ (Samai 
, สมายล์ ) , throughout the world, is a common last name. The family name สมายล์ is habitual in Sierra Leone, where it is quite a rare surname, Laos, and Trinidad and Tobago. Measured by absolute frequency, the name is most common in India, Algeria, and Sierra Leone. Likewise, สมายล์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Samai | Thailand, Sierra Leone, Laos, India, Algeria |
| สมายล์ | Thailand |