Family name เจริญชัยนนท์ (เจริญชัยนนท์ 
, Jaroenchainon, Jaroenchainont) , in the world, is a very rare cognomen. The family name เจริญชัยนนท์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, เจริญชัยนนท์ is the forename as well as the last name.