Cognomen สุมัชญา (Sumaya 
, สุมัชญา 
) , all over the world, is a common surname. The family name สุมัชญา is characteristic of Philippines, where it is quite a rare surname, Qatar, and Oman. In absolute terms, it most frequently occurs in Philippines, Bangladesh, and Ghana. More frequently, สุมัชญา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sumaya | Philippines, Saudi Arabia, India, Iraq, Bangladesh |
| สุมัชญา | Thailand |