Cognomen สีส้ม (Sisom 
, สีส้ม) , all over the world, is a rare family name. The cognomen สีส้ม is habitual in Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, สีส้ม is the forename as well as the last name.