Family name อาทิตย์อุทัย (Rising Sun 
, อาทิตย์อุทัย 
, Sunthudyon ) , in the entire world, is a very rare surname. The last name อาทิตย์อุทัย is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. More frequently, อาทิตย์อุทัย is the forename as well as the last name.