Surname บุญสมชาย (บุญสมชาย 
, Boonsomchai , Bunsomchai ) , all around the world, is a very rare cognomen. The cognomen บุญสมชาย is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, บุญสมชาย is the forename as well as the last name.