Family name Дайя (Daya 
, Daiya 
, Дайя 
) , in all the world, is a common cognomen. The last name Дайя is characteristic of Lesotho, where it is quite a common surname, Lebanon, where it is quite a rare surname, and Zambia. In absolute terms, it is the most numerous in India, Indonesia, and Philippines. More frequently, Дайя is the forename as well as the last name.