Family name จุฬากาญจน์ (จุฬากาญจน์ 
, Chulakan , Chulakarn ) , across the world, is a very rare cognomen. The cognomen จุฬากาญจน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, จุฬากาญจน์ is the forename as well as the last name.