Cognomen วิบูลย์ธรรม (วิบูลย์ธรรม 
) , in all the world, is a very rare surname. The family name วิบูลย์ธรรม is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, วิบูลย์ธรรม is the forename as well as the last name.