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Last name Tongiw (Tongiw ) , throughout the world, is a rare cognomen. The cognomen Tongiw is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
ทองอิ้ว, and โตงิ้ว
Thanon, Sukanya, Nathinat, Nithinat, Nithinst, Nopparut, and Eaktanat