Cognomen สุมทุม (สุมทุม 
, Sumtum , Sumthum ) , in the world, is a rare surname. The last name สุมทุม is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, สุมทุม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sumtum, Sumthum, สุมทุม | Thailand |