Family name วรจักร (วรจักร 
, Vorachak 
, Worajak ) , around the world, is a rare cognomen. The cognomen วรจักร is habitual in Laos, where it is quite a rare surname, Thailand, where it is a rare surname, and Argentina, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Thailand, Laos, and the United States. Also, วรจักร is the forename as well as the last name.