Cognomen Nantasuk (Nantasuk 
, นันทสุข , อนันตะสุข ) , all around the world, is a rare last name. The family name Nantasuk is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Nantasuk is the forename as well as the last name.