Across the world, ชัดเจน (ชัดเจน 
, Chadjane , Chatchen ) is a very rare largely masculine, but uncommonly feminine forename. The first name ชัดเจน is habitual in South-eastern Asia, particularly Thailand, where it is a rare dominantly male, but seldom female name. Likewise, ชัดเจน is the last name as well as the forename.