Cognomen วิสัย (วิสัย 
, Visaya 
, Wisai 
) , in all the world, is quite a common last name. The family name วิสัย is habitual in Philippines, where it is quite a rare surname, United Arab Emirates, and Qatar, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Philippines, Thailand, and the United States. Very seldom, วิสัย is the forename as well as the last name.