Cognomen Sumjit (รวมจิต 
, Sumjit 
) , in all the world, is a very rare last name. The last name Sumjit is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, and Philippines, where it is an extremely rare surname. Likewise, Sumjit is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| รวมจิต | Thailand |
| Sumjit | United States, Thailand, Philippines, Norway, India |