Family name Somlack (Somlack 
) , globally, is an extremely rare last name. Much more prevalently, Somlack is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Somlack | Laos, United States, Thailand |
Langsy, Nhoybouakong, Stewart, Phiouphilavanh, Somsouthi, and Srihirundej