Family name Duai (Duai 
, ดวย 
, ด้วย) , around the globe, is a rare last name. The surname Duai is habitual in Malaysia, where it is a rare surname, Myanmar, where it is a very rare surname, and Venezuela. In absolute terms, the name is most common in Malaysia, Myanmar, and China. Also, Duai is the forename as well as the last name.