Last name เดา (Dao 
, เดา 
, Guessin) , in all the world, is a widespread surname. The family name เดา is characteristic of Macao, where it is quite a common surname, Vietnam, and Mali (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Vietnam, China, and the United States. Very seldom, เดา is the forename as well as the last name.