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Family name Dayao (大尧 , Dayao ) , in all the world, is a common last name. The cognomen Dayao is habitual in Philippines, where it is quite a common surname, United Arab Emirates, where it is quite a rare surname, and Qatar. In absolute terms, it is commonest in Philippines, United Arab Emirates, and the United States. Very seldom, Dayao is the forename as well as the last name.