Cognomen ไทยประสิทธิ์ (ไทยประสิทธิ์ 
) , around the globe, is a rare family name. The cognomen ไทยประสิทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, ไทยประสิทธิ์ is the forename as well as the last name.