Family name Somphet (สมเพชร 
, Somphet 
, สมเพ็ชร ) , worldwide, is quite a rare cognomen. The last name Somphet is characteristic of South-eastern Asia, particularly Laos, where it is quite a common surname, Thailand, where it is quite a rare surname, and Cambodia, where it is a very rare surname. In absolute terms, it is commonest in Thailand, Laos, and the United States. More prevalently, Somphet is the forename as well as the last name.