Last name บุญหิรัญ (บุญหิรัญ 
, Boonhirun ) , all around the world, is a very rare surname. The family name บุญหิรัญ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, บุญหิรัญ is the forename as well as the last name.