Surname Graya (สีเทา 
, Graya 
) , throughout the world, is a rare family name. The family name Graya is characteristic of Thailand, where it is quite a rare surname, Tunisia, where it is a rare surname, and the United Kingdom, where it is a very rare surname. In absolute terms, the name is most common in Thailand, Tunisia, and Pakistan. Very seldom, Graya is the forename as well as the last name.