Cognomen วาจารัตน์ (Vajarat 
, วาจารัตน์ ) , in the entire world, is a rare last name. The cognomen วาจารัตน์ is characteristic of Thailand, where it is a rare surname, and India, where it is an extremely rare surname. Very seldom, วาจารัตน์ is the forename as well as the last name.