Cognomen Samao (เสมา 
, Samao 
) , around the world, is a rare last name. The cognomen Samao is characteristic of Thailand, where it is a rare surname, Syria, and Malaysia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Thailand, India, and Syria. More frequently, Samao is the forename as well as the last name.