Around the world, เสริมสิทธิ์ (เสริมสิทธิ์ 
, Supphasit ) is a very rare principally masculine, but very seldom female first name. The forename เสริมสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare primarily masculine, but scarcely female name. Much less frequently, เสริมสิทธิ์ is the last name as well as the forename.