Around the globe, ประสิทธิ์สม (ประสิทธิ์สม 
) is a very rare primarily feminine, but scarcely boy's given name. The forename ประสิทธิ์สม is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare primarily feminine, but very seldom male name. Also, ประสิทธิ์สม is the last name as well as the forename.