Last name สุมานิจ (สุมานิจ 
) , across the world, is an extremely rare cognomen. The last name สุมานิจ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, สุมานิจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สุมานิจ | Thailand |