Surname दया (Daya 
, दया , دیا) , around the world, is a common cognomen. The surname दया is habitual in 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 prevalently, दया is the forename as well as the last name.