Cognomen ชื่นหทัย (Chuenhatai 
, ชื่นหทัย, Be Happy) , around the globe, is an extremely rare last name. The cognomen ชื่นหทัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, ชื่นหทัย is the forename as well as the last name.