Cognomen ประสพกาญจน์ (Prasopkarn 
, ประสพกาญจน์ ) , around the world, is a very rare family name. The cognomen ประสพกาญจน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ประสพกาญจน์ is the forename as well as the last name.