Last name กัลยาณรัตน์ (กัลยาณรัตน์ 
) , globally, is a very rare cognomen. The surname กัลยาณรัตน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, กัลยาณรัตน์ is the forename as well as the last name.