Family name Saeyang (Saeyang 
, แซ่ยั้ง, แซ่ย่าง) , in the entire world, is quite a common cognomen. The cognomen Saeyang is habitual in Belize, where it is quite a rare surname, Thailand, and Taiwan, where it is a rare surname. In absolute terms, the name is most common in Thailand, China, and Taiwan. Very seldom, Saeyang is the forename as well as the last name.