Throughout the world, Chaiyachet (ไชยเชษฐ์ 
, Chaiyachet 
) is a rare primarily masculine, but very seldom feminine forename. The first name Chaiyachet is characteristic of South-eastern Asia, particularly Thailand, where it is a rare principally masculine, but scarcely female name. Likewise, Chaiyachet is the last name as well as the forename.