Last name Sumay (สุเมธ 
, Sumar 
, Sumay 
) , all over the world, is a common surname. The last name Sumay is characteristic of Bosnia and Herzegovina, where it is quite a common surname, Serbia, where it is quite a rare surname, and India. Measured by absolute frequency, it is commonest in India, Indonesia, and Kenya. Likewise, Sumay is the forename as well as the last name.