Family name Saion (Saion 
) , all over the world, is a rare surname. The cognomen Saion is habitual in South-eastern Asia, particularly Malaysia, where it is quite a rare surname, Singapore, where it is a rare surname, and Thailand. Measured by absolute frequency, the name is most common in South-eastern Asia, particularly Malaysia, Thailand, and Myanmar. Also, Saion is the forename as well as the last name.