Surname ประสิทธฺิ์ (ประสิทธฺิ์ 
) , around the globe, is an extremely rare family name. The cognomen ประสิทธฺิ์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Also, ประสิทธฺิ์ is the forename as well as the last name.