Cognomen Tya (Tya 
, Тиа 
) , in the world, is a common last name. The cognomen Tya is habitual in Indonesia, where it is quite a rare surname, Taiwan, where it is a rare surname, and Hong Kong. Not in comparison with a country's population, it is commonest in Indonesia, India, and Myanmar. Also, Tya is the forename as well as the last name.