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Last name แก้วใจ (Kaewjai , Kaeochai , แก้วใจ) , all around the world, is a rare surname. The surname แก้วใจ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is an extremely rare surname. More prevalently, แก้วใจ is the forename as well as the last name.