Cognomen อิงกาญจน์ (อิงกาญจน์ 
, Engkarn , Eingarn ) , throughout the world, is an extremely rare family name. The surname อิงกาญจน์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, อิงกาญจน์ is the forename as well as the last name.