Family name สุมาลย์ (Suman 
, Sumal 
, สุมาลย์ 
) , in all the world, is a widespread last name. The cognomen สุมาลย์ is characteristic of Nepal, where it is quite a common surname, Qatar, and Oman (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Southern Asia, particularly India, Bangladesh, and Nepal. Much more prevalently, สุมาลย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Suman | Malaysia, Bangladesh, India, Saudi Arabia, Nepal |
| Sumal | United Arab Emirates, Malaysia, India, Saudi Arabia, Nepal |
| สุมาลย์ | Thailand |