Globally, สมมิตร์ (สมมิตร์ 
) is a rare dominantly masculine, but infrequently female first name. The first name สมมิตร์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare largely masculine, but uncommonly girly name. Very seldom, สมมิตร์ is the last name as well as the forename.