Surname เซา (Sauw 
, Saao 
, Sauo 
) , throughout the world, is a rare cognomen. The cognomen เซา is characteristic of Bangladesh, where it is a rare surname, Belgium, and Indonesia, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Bangladesh, Indonesia, and India. Also, เซา is the forename as well as the last name.