Family name Giyong (기용 
, Giyong 
) , across the world, is a very rare surname. The cognomen Giyong is characteristic of Spain, where it is a very rare surname, Thailand, where it is an extremely rare surname, and Philippines. Measured by absolute frequency, it is the most numerous in China, Spain, and Thailand. Much more frequently, Giyong is the forename as well as the last name.