Last name สุมาลัย (สุมาลัย 
, Sumalai 
) , around the globe, is quite a rare cognomen. The surname สุมาลัย is characteristic of Thailand, where it is quite a rare surname, Norway, where it is a very rare surname, and Malaysia. More frequently, สุมาลัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สุมาลัย | Thailand |
| Sumalai | Thailand, United States, India, Netherlands, Malaysia |