Last name สมกัน (สมกัน 
, Somkan 
, Somgan 
) , in the entire world, is a rare cognomen. The cognomen สมกัน is habitual in Thailand, where it is a rare surname, Turkey, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, สมกัน is the forename as well as the last name.