Cognomen วัจนาภรณ์ (Wajanaporn 
, Watjanaporn , วัจนาภรณ์ ) , around the world, is a very rare surname. The cognomen วัจนาภรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, วัจนาภรณ์ is the forename as well as the last name.