Surname อุดมรัตน์ (อุดมรัตน์ 
, Udomrat 
) , in the world, is quite a rare family name. The last name อุดมรัตน์ is characteristic of Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Likewise, อุดมรัตน์ is the forename as well as the last name.