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Last name Tawan (ตะวัน , Tawan , ถวัลย์ ) , all around the world, is quite a rare surname. The family name Tawan is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname, Malaysia, and Philippines, where it is a rare surname. In absolute terms, the name is most common in South-eastern Asia, particularly Thailand, Indonesia, and Philippines. More frequently, Tawan is the forename as well as the last name.