Family name Sumalai (Sumalai 
) , around the world, is a rare last name. The last name Sumalai is characteristic of Thailand, where it is a rare surname, Norway, where it is a very rare surname, and Malaysia. Also, Sumalai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sumalai | Thailand, United States, India, Netherlands, Malaysia |