Cognomen เฉา (Chao 
, Chaoe 
, เฉา 
) , all over the world, is a widespread surname. The cognomen เฉา is habitual in Macao, where it is a widespread surname, Cayman Islands, where it is quite a common surname, and Taiwan (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in China, Taiwan, and the United States. Also, เฉา is the forename as well as the last name.