Cognomen ธีรกรณ์ (ธีรกรณ์ 
, Thirakon ) , worldwide, is a very rare last name. The cognomen ธีรกรณ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, ธีรกรณ์ is the forename as well as the last name.