Cognomen Sumarai (Sumarai 
) , all over the world, is a rare surname. The surname Sumarai is habitual in India, where it is a very rare surname, Thailand, and Philippines, where it is an extremely rare surname. Much less frequently, Sumarai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sumarai | Thailand, India, Philippines |