Cognomen สะอาด (สะอาด 
, Saat 
, Saard 
) , around the globe, is a common family name. The last name สะอาด is characteristic of Estonia, where it is quite a common surname, Malaysia, and Maldives, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in South-eastern Asia, particularly Malaysia, Indonesia, and Thailand. Also, สะอาด is the forename as well as the last name.