Last name สมมิตร (Somit 
, สมมิตร , Sommit 
) , in the entire world, is quite a rare family name. The cognomen สมมิตร is habitual in Thailand, where it is quite a rare surname, Sudan, where it is a rare surname, and Indonesia, where it is a very rare surname. More frequently, สมมิตร is the forename as well as the last name.