Family name ดาวชัย (Daochai 
, ดาวชัย , Dowchai 
) , all over the world, is a rare cognomen. The surname ดาวชัย is characteristic of Thailand, where it is a rare surname, Malaysia, where it is an extremely rare surname, and the United Kingdom. More prevalently, ดาวชัย is the forename as well as the last name.