Surname ສມໃຈ (ສມໃຈ 
) , throughout the world, is a rare family name. The cognomen ສມໃຈ is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname. Much more frequently, ສມໃຈ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ສມໃຈ | Laos |