Family name ລດສະຫມ (ລດສະຫມ 
) , in the world, is quite a rare surname. The cognomen ລດສະຫມ is habitual in South-eastern Asia, particularly Laos, where it is quite a common surname. More prevalently, ລດສະຫມ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ລດສະຫມ | Laos |