Last name อินทรรัตน์ (Intarat 
, อินทรรัตน์ , Indharat ) , across the world, is quite a rare surname. The surname อินทรรัตน์ is habitual in Thailand, where it is quite a rare surname, Germany, where it is an extremely rare surname, and the United States. Much less frequently, อินทรรัตน์ is the forename as well as the last name.