Throughout the world, เทียนใจ (เทียนใจ 
, Tienjai 
, Tianjai ) is a very rare largely female, but seldom male given name. The first name เทียนใจ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare dominantly feminine, but uncommonly boy's name. Also, เทียนใจ is the last name as well as the forename.