Cognomen Tummat (สุมมาตย์ 
, Tummat 
) , in all the world, is quite a rare surname. The last name Tummat is habitual in Thailand, where it is quite a rare surname, Germany, where it is an extremely rare surname, and India.
| VARIANT | COUNTRY |
|---|---|
| สุมมาตย์ | Thailand |
| Tummat | Germany, India |