Last name สุมาน (Suman 
, Sumarn 
, สุมาน ) , globally, is a widespread family name. The last name สุมาน is characteristic of Nepal, where it is quite a common surname, Qatar, and Oman (explore the name in all countries). In absolute terms, it is commonest in Southern Asia, particularly India, Bangladesh, and Nepal. Much more frequently, สุมาน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Suman | Malaysia, Bangladesh, India, Saudi Arabia, Nepal |
| Sumarn | Malaysia, India, Thailand |
| สุมาน | Thailand |
| Sumaman | India, United States, Thailand, United Kingdom |