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Family name Tirawat (ถิรวัฒน์ , Tirawat , ตีรวัฒน์ ) , in the world, is a rare last name. The surname Tirawat is habitual in Thailand, where it is quite a rare surname, Malaysia, where it is an extremely rare surname, and the United States. More prevalently, Tirawat is the forename as well as the last name.