In the world, สมประสิทธิ์ (Somprasit 
, สมประสิทธิ์ ) is a very rare dominantly boy's, but infrequently female forename. The forename สมประสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare largely male, but seldom feminine name. Much less frequently, สมประสิทธิ์ is the last name as well as the forename.