Cognomen วัจนรัตน์ (วัจนรัตน์ 
) , in the world, is a very rare last name. The surname วัจนรัตน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, วัจนรัตน์ is the forename as well as the last name.
ศิริพร, ขวัญนภา, and สิริทรัพย์