Cognomen Tiyakun (ติยะกุล 
, Tiyakun 
) , across the world, is a very rare family name. The cognomen Tiyakun is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Tiyakun is the forename as well as the last name.
Wisanu, and Kornchanok